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Magalhães HIR, da Silva MD, Dos Santos Penna Neto AM, Penna ANM, Barto VH, Miglino MA, Hiraki KRN, de Assis Ribeiro L. Morphological description of the temporomandibular joint ligaments in domestic pigs. Anat Histol Embryol 2024; 53:e13097. [PMID: 39092540 DOI: 10.1111/ahe.13097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/18/2024] [Accepted: 07/21/2024] [Indexed: 08/04/2024]
Abstract
The temporomandibular joint (TMJ) ligaments play crucial roles in its function or dysfunction. The objective of this study was to describe the macro and microscopic morphology of these ligaments in domestic pigs, aiming to: (1) expand knowledge about the species; (2) provide anatomical references for advancing veterinary therapy and utilizing pigs as animal models in craniofacial research. Heads of young Sus scrofa domesticus were dissected to identify TMJ ligaments. Fragments of these ligaments were collected and processed for subsequent histological analysis with Haematoxylin and eosin staining. The results were qualitatively described. Pigs exhibited a TMJ reinforced by three individualized capsular ligaments: a lateral ligament, attaching to the ventral margin of the zygomatic process of the temporal bone and the lateral margin of the mandibular neck; a caudomedial ligament, attaching to the retroarticular process of the squamous part of the temporal bone and the caudomedial margin of the mandibular neck and a caudolateral ligament, attaching to the ventral margin of the base of the zygomatic process of the temporal bone and the caudal margin of the mandibular neck. The lateral ligament exhibited a greater constitution of dense irregular connective tissue, while the caudomedial and caudolateral ligaments showed a greater constitution of dense regular connective tissue. It is concluded that the TMJ of pigs presents one more ligament than horses, cattle, dogs, cats and what has been described for pigs themselves. We believe these results may contribute to the improvement of veterinary clinical and surgical therapy overall, as well as provide essential morphological information for a better interpretation and application of interspecies results in craniofacial research using pigs as an experimental model, as in the case of humans.
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Affiliation(s)
- Henrique Inhauser Riceti Magalhães
- School of Veterinary Medicine, Cruzeiro Do Sul University, São Paulo, Brazil
- Comparative Anatomy Research Group, School of Veterinary Medicine and Animal Sciences, Federal University of Uberlândia, Uberlândia, Brazil
| | - Mônica Duarte da Silva
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | | | | - Victor Hugo Barto
- Comparative Anatomy Research Group, School of Veterinary Medicine and Animal Sciences, Federal University of Uberlândia, Uberlândia, Brazil
| | | | | | - Lucas de Assis Ribeiro
- Comparative Anatomy Research Group, School of Veterinary Medicine and Animal Sciences, Federal University of Uberlândia, Uberlândia, Brazil
- Federal University of Uberlândia, Uberlândia, Brazil
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Gupta C, Shree N, Saruparia K, Saboo S, Kumari N, Shah G, Das S. Utility of pig head model as an oculoplastic wet lab surgical training tool. Orbit 2024:1-9. [PMID: 39023222 DOI: 10.1080/01676830.2024.2363217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 05/29/2024] [Indexed: 07/20/2024]
Abstract
PURPOSE To assess the utility of pig head model as an oculoplastic surgical training tool. METHODS Fresh pig head was availed for surgical workshop for entropion correction, eyelid margin repair, and evisceration with implant for oculoplastic surgery-naïve participants. Skill improvement, surgical understanding, and performance of the participants were evaluated both subjectively and objectively by trained oculoplastic surgeons. Subjective assessment was done by a standardized questionnaire based on Likert scale shared with the participants post training. Objective evaluation was done by the faculty based on a three-point scale and a competency-based surgical assessment rubric. RESULTS There were 18 surgery-naïve participants in the workshop which comprised ophthalmology residents and comprehensive ophthalmologists. About 88.88% of the participants were able to perform the lid margin and sub-tarsal dissection in entropion surgery. While performing lid tear repair, 94.44% were correctly able to identify the grey line and anterior and posterior lamellae. About 83.33% of the participants were able to place an implant in the scleral shell or intraconal space. About 83.33% of the participants noted that texture and tissue maneuvering were similar to the human eye while performing surgical steps. About 94.44% of the participants reported better understanding, development of skill and additional confidence after training. The median score on objective assessment was 3. The performance on real patients resulted in a median score of 4 for entropion correction. CONCLUSION Porcine orbital dissection is an available, affordable, and useful tool for oculoplastic surgical training. Training on porcine model can improve anatomical understanding, clinical judgement, and surgical efficiency in trainees.
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Affiliation(s)
- Chhavi Gupta
- Oculoplasty and Ocular Oncology Services, Dr Shroff's Charity Eye Hospital, New Delhi, India
| | - Neha Shree
- Oculoplasty and Ocular Oncology Services, Dr Shroff's Charity Eye Hospital, New Delhi, India
| | - Kshiti Saruparia
- Oculoplasty and Ocular Oncology Services, Dr Shroff's Charity Eye Hospital, New Delhi, India
| | - Surbhi Saboo
- Oculoplasty and Ocular Oncology Services, Dr Shroff's Charity Eye Hospital, New Delhi, India
| | - Namita Kumari
- Oculoplasty and Ocular Oncology Services, Dr Shroff's Charity Eye Hospital, New Delhi, India
| | - Gaurav Shah
- Oculoplasty and Ocular Oncology Services, Dr Shroff's Charity Eye Hospital, New Delhi, India
| | - Sima Das
- Oculoplasty and Ocular Oncology Services, Dr Shroff's Charity Eye Hospital, New Delhi, India
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Emken S, Witzel C, Kierdorf U, Frölich K, Kierdorf H. A labeling study of dentin formation rates during crown and root growth of porcine mandibular first molars. Anat Rec (Hoboken) 2024; 307:2103-2120. [PMID: 38051150 DOI: 10.1002/ar.25358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 12/07/2023]
Abstract
We used fluorochrome labeling to study spatiotemporal variation of dentin apposition (DAR) and extension (DER) rates during crown and root formation of mandibular first molars from wild boar and domestic pigs. DAR was reconstructed along the course of dentinal tubules in four zones of the crown and in the upper root area. In all five zones, mean DAR increased during the first 30% to 40% of apposition, reaching highest values (22-23 μm/day) in the upper-lateral crown zone. Lowest values were recorded near the dentin-pulp interface (DPI). Typically, DARs in contemporaneously formed dentin areas were higher in more cuspally compared to more cervically/apically located zones. DER was high (>200 μm/day) in early postnatal crown dentin and then decreased markedly in cervical direction, with lowest values in the cervical crown zone. After this nadir, DER sharply increased in the upper 30% to 40% of the root extension, reaching values equaling (wild boar) or even surpassing (domestic pigs) those recorded in the upper lateral crown. After this peak, DER again decreased. While DAR did not differ markedly between wild boar and domestic pigs, the DER showed marked differences, both regarding maximum values (208.1 μm/day in wild boar, 272.2 μm/day in domestic pigs) and the timing of the root growth spurt, which occurred earlier in the domestic pigs. We consider the more rapid recruitment of secretory odontoblasts in domestic pigs (reflected by higher DER) a side effect of selection for rapid body growth during pig domestication.
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Affiliation(s)
- Simon Emken
- Department of Biology, University of Hildesheim, Hildesheim, Germany
| | - Carsten Witzel
- Department of Biology, University of Hildesheim, Hildesheim, Germany
| | - Uwe Kierdorf
- Department of Biology, University of Hildesheim, Hildesheim, Germany
| | - Kai Frölich
- Department of Biology, University of Hildesheim, Hildesheim, Germany
- Tierpark Arche Warder e.V., Warder, Germany
| | - Horst Kierdorf
- Department of Biology, University of Hildesheim, Hildesheim, Germany
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Shanbhag S, Kampleitner C, Sanz-Esporrin J, Lie SA, Gruber R, Mustafa K, Sanz M. Regeneration of alveolar bone defects in the experimental pig model: A systematic review and meta-analysis. Clin Oral Implants Res 2024; 35:467-486. [PMID: 38450852 DOI: 10.1111/clr.14253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/16/2024] [Accepted: 02/20/2024] [Indexed: 03/08/2024]
Abstract
OBJECTIVE Pigs are emerging as a preferred experimental in vivo model for bone regeneration. The study objective was to answer the focused PEO question: in the pig model (P), what is the capacity of experimental alveolar bone defects (E) for spontaneous regeneration in terms of new bone formation (O)? METHODS Following PRISMA guidelines, electronic databases were searched for studies reporting experimental bone defects or extraction socket healing in the maxillae or mandibles of pigs. The main inclusion criteria were the presence of a control group of untreated defects/sockets and the assessment of regeneration via 3D tomography [radiographic defect fill (RDF)] or 2D histomorphometry [new bone formation (NBF)]. Random effects meta-analyses were performed for the outcomes RDF and NBF. RESULTS Overall, 45 studies were included reporting on alveolar bone defects or extraction sockets, most frequently in the mandibles of minipigs. Based on morphology, defects were broadly classified as 'box-defects' (BD) or 'cylinder-defects' (CD) with a wide range of healing times (10 days to 52 weeks). Meta-analyses revealed pooled estimates (with 95% confidence intervals) of 50% RDF (36.87%-63.15%) and 43.74% NBF (30.47%-57%) in BD, and 44% RDF (16.48%-71.61%) and 39.67% NBF (31.53%-47.81%) in CD, which were similar to estimates of socket-healing [48.74% RDF (40.35%-57.13%) and 38.73% NBF (28.57%-48.89%)]. Heterogeneity in the meta-analysis was high (I2 > 90%). CONCLUSION A substantial body of literature revealed a high capacity for spontaneous regeneration in experimental alveolar bone defects of (mini)pigs, which should be considered in future studies of bone regeneration in this animal model.
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Affiliation(s)
- Siddharth Shanbhag
- Department of Immunology and Transfusion Medicine, Haukeland University Hospital, Bergen, Norway
- Center for Translational Oral Research (TOR), Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Carina Kampleitner
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, The Research Center in Cooperation with AUVA, Vienna, Austria
- Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Javier Sanz-Esporrin
- ETEP Research Group, Faculty of Odontology, University Complutense of Madrid, Madrid, Spain
| | - Stein-Atle Lie
- Center for Translational Oral Research (TOR), Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Reinhard Gruber
- Austrian Cluster for Tissue Regeneration, Vienna, Austria
- Department of Oral Biology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Kamal Mustafa
- Center for Translational Oral Research (TOR), Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Mariano Sanz
- ETEP Research Group, Faculty of Odontology, University Complutense of Madrid, Madrid, Spain
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Sourvanos D, Zhu TC, Dimofte A, Busch TM, Lander B, Burrell JC, Neiva R, Fiorellini JP. A novel investigational preclinical model to assess fluence rate for dental oral craniofacial tissues. Photodiagnosis Photodyn Ther 2024; 46:104015. [PMID: 38373469 PMCID: PMC11139582 DOI: 10.1016/j.pdpdt.2024.104015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 02/06/2024] [Accepted: 02/09/2024] [Indexed: 02/21/2024]
Abstract
OBJECTIVE Photodynamic Therapy (PDT) and Photobiomodulation (PBM) are recognized for their potential in treating head and neck conditions. The heterogeneity of human tissue optical properties presents a challenge for effective dosimetry. The porcine mandible cadaver serves as an excellent model and has several similarities to human tissues of the dental oral craniofacial complex. This study aims to validate a novel modeling system that will help refine PDT and PBM dosimetry for the head and neck region. METHODS AND MATERIALS Light transmission was analyzed through several tissue combinations at distances of 2 mm to 10 mm. Maximum light fluence rates (mW/cm2) were compared across tissue types to reveal the effects of tissue heterogeneity. RESULTS The study revealed that light fluence is affected by tissue composition, with dentin/enamel showing reduced transmission and soft tissue regions exhibiting elevated values. The porcine model has proven to be efficient in mimicking human tissue responses to light, enabling the potential to optimize future protocols. CONCLUSION The porcine mandible cadaver is a novel model to understand the complex interactions between light and tissue. This study provides a foundation for future investigations into dosimetry optimization for PDT and PBM.
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Affiliation(s)
- Dennis Sourvanos
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, PA, USA; Center for Innovation and Precision Dentistry (CiPD), School of Dental Medicine, School of Engineering, University of Pennsylvania, PA, USA.
| | - Timothy C Zhu
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Andreea Dimofte
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Theresa M Busch
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Bradley Lander
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, PA, USA
| | - Justin C Burrell
- Center for Innovation and Precision Dentistry (CiPD), School of Dental Medicine, School of Engineering, University of Pennsylvania, PA, USA; Department of Oral and Maxillofacial Surgery, Hospital of the University of Pennsylvania and University of Pennsylvania School of Dental Medicine, University of Pennsylvania, PA, USA; Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michal J. Crescenz Veterans Affairs Medical Center, PA, USA
| | - Rodrigo Neiva
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, PA, USA
| | - Joseph P Fiorellini
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, PA, USA
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Mosaddad SA, Hussain A, Tebyaniyan H. Exploring the Use of Animal Models in Craniofacial Regenerative Medicine: A Narrative Review. TISSUE ENGINEERING. PART B, REVIEWS 2024; 30:29-59. [PMID: 37432898 DOI: 10.1089/ten.teb.2023.0038] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
The craniofacial region contains skin, bones, cartilage, the temporomandibular joint (TMJ), teeth, periodontal tissues, mucosa, salivary glands, muscles, nerves, and blood vessels. Applying tissue engineering therapeutically helps replace lost tissues after trauma or cancer. Despite recent advances, it remains essential to standardize and validate the most appropriate animal models to effectively translate preclinical data to clinical situations. Therefore, this review focused on applying various animal models in craniofacial tissue engineering and regeneration. This research was based on PubMed, Scopus, and Google Scholar data available until January 2023. This study included only English-language publications describing animal models' application in craniofacial tissue engineering (in vivo and review studies). Study selection was based on evaluating titles, abstracts, and full texts. The total number of initial studies was 6454. Following the screening process, 295 articles remained on the final list. Numerous in vivo studies have shown that small and large animal models can benefit clinical conditions by assessing the efficacy and safety of new therapeutic interventions, devices, and biomaterials in animals with similar diseases/defects to humans. Different species' anatomical, physiologic, and biological features must be considered in developing innovative, reproducible, and discriminative experimental models to select an appropriate animal model for a specific tissue defect. As a result, understanding the parallels between human and veterinary medicine can benefit both fields.
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Affiliation(s)
- Seyed Ali Mosaddad
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ahmed Hussain
- School of Dentistry, Edmonton Clinic Health Academy, University of Alberta, Edmonton, Canada
| | - Hamid Tebyaniyan
- Department of Science and Research, Islimic Azade University, Tehran, Iran
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Izumi K, Yortchan W, Aizawa Y, Kobayashi R, Hoshikawa E, Ling Y, Suzuki A. Recent trends and perspectives in reconstruction and regeneration of intra/extra-oral wounds using tissue-engineered oral mucosa equivalents. JAPANESE DENTAL SCIENCE REVIEW 2023; 59:365-374. [PMID: 37954029 PMCID: PMC10632115 DOI: 10.1016/j.jdsr.2023.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/25/2023] [Accepted: 10/19/2023] [Indexed: 11/14/2023] Open
Abstract
Many conditions, including cancer, trauma, and congenital anomalies, can damage the oral mucosa. Multiple cultures of oral mucosal cells have been used for biocompatibility tests and oral biology studies. In recent decades, the clinical translation of tissue-engineered products has progressed significantly in developing tangible therapies and inspiring advancements in medical science. However, the reconstruction of an intraoral mucosa defect remains a significant challenge. Despite the drawbacks of donor-site morbidity and limited tissue supply, the use of autologous oral mucosa remains the gold standard for oral mucosa reconstruction and repair. Tissue engineering offers a promising solution for repairing and reconstructing oral mucosa tissues. Cell- and scaffold-based tissue engineering approaches have been employed to treat various soft tissue defects, suggesting the potential clinical use of tissue-engineered oral mucosa (TEOMs). In this review, we first cover the recent trends in the reconstruction and regeneration of extra-/intra-oral wounds using TEOMs. Next, we describe the current status and challenges of TEOMs. Finally, future strategic approaches and potential technologies to support the advancement of TEOMs for clinical use are discussed.
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Affiliation(s)
- Kenji Izumi
- Division of Biomimetics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
| | - Witsanu Yortchan
- Division of Biomimetics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
- Department of Preventive Dentistry, Faculty of Dentistry, Naresuan University, Phitsanulok, Thailand
| | - Yuka Aizawa
- Division of Biomimetics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
| | - Ryota Kobayashi
- Division of Biomimetics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
| | - Emi Hoshikawa
- Division of Biomimetics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
- Division of Periodontology, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
| | - Yiwei Ling
- Division of Bioinformatics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Ayako Suzuki
- Division of Biomimetics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Japan
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Starch-Jensen T, Schou S, Terheyden H, Bruun NH, Aludden H. Bone regeneration after maxillary sinus floor augmentation with different ratios of autogenous bone and deproteinized bovine bone mineral an in vivo experimental study. Clin Oral Implants Res 2023; 34:1406-1416. [PMID: 37766500 DOI: 10.1111/clr.14186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 08/01/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023]
Abstract
OBJECTIVE Test the hypothesis of no difference in bone regeneration after maxillary sinus floor augmentation (MSFA) with different ratios of iliac or mandibular autogenous bone (AB) graft and deproteinized bovine bone mineral (DBBM). MATERIALS AND METHODS Forty minipigs were randomly allocated to bilateral MSFA using: (A) 100% AB, (B) 75% AB and 25% DBBM, (C) 50% AB and 50% DBBM, (D) 25% AB and 75% DBBM, or (E) 100% DBBM. The animals were euthanized 12 weeks after surgery. Percentage of bone, non-mineralized tissue, and residual DBBM were estimated by histomorphometric analysis in a randomly selected region of interest and summarized as mean percentage with 95% confidence interval (CI). RESULTS Mean percentage of bone following MSFA with iliac or mandibular AB graft was: (A) 55.5% and 64.2%, (B) 60.3% and 61.6%, (C) 54.4% and 52.1%, (D) 51.8% and 53.1%, and (E) 47.6%, respectively. There was a significant trend toward a higher percentage of bone, with a higher ratio of AB within the graft (p < .01), regardless of the origin of AB graft (iliac or mandible). CONCLUSIONS The hypothesis was rejected since percentage of bone was significantly increased with larger proportions of AB within the graft. Consequently, AB or a mixture of AB and diminutive quantities of DBBM seem to be the preferred graft for MSFA based solely on histomorphometric assessment. However, it should be emphasized that newly formed bone and residual AB graft particles could not be distinguished by the applied histologic procedure.
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Affiliation(s)
- Thomas Starch-Jensen
- Department of Oral and Maxillofacial Surgery, Aalborg University Hospital, Aalborg, Denmark
- Department of Clinical Medicine, The Faculty of Medicine, Aalborg University, Aalborg, Denmark
| | - Søren Schou
- Private Practice in Oral Surgery, Specialtandlaegerne Seedorffs Straede, Aarhus, Denmark
| | - Hendrik Terheyden
- Department of Oral and Maxillofacial Surgery, Red Cross Hospital, Kassel, Germany
| | - Niels Henrik Bruun
- Unit of Clinical Biostatistics, Aalborg University Hospital, Aalborg, Denmark
| | - Hanna Aludden
- Department of Oral and Maxillofacial Surgery, NU-Hospital Organization, Trollhättan, Sweden
- Department of Biomaterials, Institute for Surgical Science, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Matos FG, Stremel ACA, Lipinski LC, Cirelli JA, Dos Santos FA. Dental implants in large animal models with experimental systemic diseases: A systematic review. Lab Anim 2023; 57:489-503. [PMID: 37021606 DOI: 10.1177/00236772221124972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
This systematic review aims to identify and discuss the most used methodologies in pre-clinical studies for the evaluation of the implementation of dental implants in systemically compromised pigs and sheep. This study provides support and guidance for future research, as well as for the prevention of unnecessary animal wastage and sacrifice. Preferred Reporting for Systematic Reviews and Meta-Analyses (PRISMA) was used as a guideline; electronic searches were performed in PubMed, Scopus, Scielo, Web of Science, Embase, Science Direct, Brazilian Bibliography of Dentistry, Latin American and Caribbean Literature in Health Sciences, Directory of Open Access Journals, Database of Abstracts of Reviews of Effects, and gray literature until January 2022 (PROSPERO/CRD42021270119). Sixty-eight articles were chosen from the 2439 results. Most studies were conducted in pigs, mainly the Göttinger and Domesticus breeds. Healthy animals with implants installed in the jaws were predominant among the pig studies. Of the studies evaluating the effect of systemic diseases on osseointegration, 42% were performed in osteoporotic sheep, 32% in diabetic sheep, and 26% in diabetic pigs. Osteoporosis was primarily induced by bilateral ovariectomy and mainly assessed by X-ray densitometry. Diabetes was induced predominantly by intravenous streptozotocin and was confirmed by blood glucose analysis. Histological and histomorphometric analyses were the most frequently employed in the evaluation of osseointegration. The animal models presented unique methodologies for each species in the studies that evaluated dental implants in the context of systemic diseases. Understanding the most commonly used techniques will help methodological choices and the performance of future studies in implantology.
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Affiliation(s)
| | | | | | - Joni Augusto Cirelli
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, State University of São Paulo (Unesp), Brazil
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10
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Brooke N, Elliott J, Murphy T, Vera Stimpson L. Development of a radiographic technique for porcine head ballistic research. Radiography (Lond) 2023; 29:980-983. [PMID: 37595528 DOI: 10.1016/j.radi.2023.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/20/2023]
Abstract
INTRODUCTION The porcine model shows structural features comparable to that of humans and are routinely used within research, due to the ethical, legal, and practical use of post-mortem human samples. Methods for obtaining high quality and comparable reference data using standardised acquisition protocols are essential. METHODS The decapitated heads of three adult white sows were subjected to radiographic imaging before and after cranial trauma (9 mm, Heckler and Koch MP5). Digital radiographs were generated using a Siemens MULTIX TOP system with an Agfa digital detector, with foam blocks and sandbags as ancillary equipment. An iterative approach was adopted by the authors to generate reproducible radiographic views from two perpendicular angles. Specimens were kept at 5 °C and wrapped in polythene bags to reduce the impact of putrefaction. RESULTS Standardised head radiography technique was developed for superior-inferior and lateral views demonstrating porcine anatomy. Key parameters included: automatic exposure control for tube current (∼4 mAs), tube voltage of 73 kVp, 100 cm source to image receptor distance, and an anti-scatter grid. Slight variances in specimen morphology, developmental status, and soft tissue changes did not affect imaging outcomes. CONCLUSION The technique and positioning proposed in this study allows for the acquisition of high quality and reproducible radiographic images for comparable ballistic research datasets. Specimen positioning and centring of the primary beam may be applied across porcine breeds, although individual radiographic parameters may differ according to equipment specifications and specimen size. IMPLICATIONS FOR PRACTICE Development of a reproducible radiographic technique of porcine heads in forensic and veterinary research.
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Affiliation(s)
- N Brooke
- School of Law, Policing and Social Sciences, Canterbury Christ Church University, Kent, United Kingdom
| | - J Elliott
- School of Allied and Public Health Professions, Canterbury Christ Church University, Kent, United Kingdom
| | - T Murphy
- Kent Police Tactical Firearms Unit, Kent, United Kingdom
| | - L Vera Stimpson
- School of Law, Policing and Social Sciences, Canterbury Christ Church University, Kent, United Kingdom.
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11
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Millesi E, Suchyta M, Wang H, Mardini S. Anatomic Analysis of Masseteric-to-zygomatic Nerve Transfer in Rat and Pig Models. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2023; 11:e5344. [PMID: 37859639 PMCID: PMC10584298 DOI: 10.1097/gox.0000000000005344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 08/21/2023] [Indexed: 10/21/2023]
Abstract
Background Nerve transfer from the masseteric branch of the trigeminal nerve is a widely performed procedure for facial reanimation. Despite achieving powerful muscle force, clinical and aesthetic results leave room for improvement. Preclinical animal models are invaluable to establishing new therapeutic approaches. This anatomical study aimed to establish a masseteric-to-zygomatic nerve transfer model in rats and pigs. Methods The masseteric branch of the trigeminal nerve and the zygomatic branch of the facial nerve were dissected in 30 swine and 40 rat hemifaces. Both nerves were mobilized and approximated to achieve an overlap between the nerve ends. Over the course of dissecting both nerves, their anatomy, length, and branching pattern were documented. At the coaptation point, diameters of both nerves were measured, and samples were taken for neuromorphometric analysis. Results Anatomic details and landmarks were described. Tension-free coaptation was possible in all rat and pig dissections. In rats, the masseteric branch had an average diameter of 0.36 mm (±0.06), and the zygomatic branch average diameter was 0.46 mm (±0.13). In pigs, the masseteric branch measured 0.52 (±0.16) mm and the zygomatic branch, 0.59 (±0.16) mm. No significant differences were found between the diameters and axon counts of both nerves in pigs. In rats, however, their diameters, axon counts, and fascicular areas were significantly different. Conclusion Our study demonstrated the feasibility of direct masseteric-to-zygomatic nerve transfer in rats and pigs and provided general anatomic knowledge of both nerves.
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Affiliation(s)
- Elena Millesi
- From the Division of Plastic and Reconstructive Surgery, Department of Surgery, Mayo Clinic, Rochester, Minn
- Division of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria
| | - Marissa Suchyta
- From the Division of Plastic and Reconstructive Surgery, Department of Surgery, Mayo Clinic, Rochester, Minn
| | - Huan Wang
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minn
| | - Samir Mardini
- From the Division of Plastic and Reconstructive Surgery, Department of Surgery, Mayo Clinic, Rochester, Minn
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12
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Peng X, Chen J, Wang Y, Wang X, Zhao X, Zheng X, Wang Z, Yuan D, Du J. Osteogenic microenvironment affects palatal development through glycolysis. Differentiation 2023; 133:1-11. [PMID: 37267667 DOI: 10.1016/j.diff.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 05/18/2023] [Accepted: 05/24/2023] [Indexed: 06/04/2023]
Abstract
Palate development involves various events, including proliferation, osteogenic differentiation, and epithelial-mesenchymal transition. Disruption of these processes can result in the cleft palate (CP). Mouse embryonic palatal mesenchyme (MEPM) cells are commonly used to explore the mechanism of palatal development and CP. However, the role of the microenvironment in the biological properties of MEPM cells, which undergoes dynamic changes during palate development, is rarely reported. In this study, we investigated whether there were differences between the palatal shelf mesenchyme at different developmental stages. Our results found that the palatal shelves facilitate proliferation at the early palate stage at mouse embryonic day (E) 13.5 and the tendency towards osteogenesis at E15.5, the late palate development stage. And the osteogenic microenvironment, which was mimicked by osteogenic differentiation medium (OIM), affected the biological properties of MEPM cells when compared to the routine medium. Specifically, MEPM cells showed slower proliferation, shorter S phase, increased apoptosis, and less migration distance after osteogenesis. E15.5 MEPM cells were more sensitive than E13.5, showing an earlier change. Moreover, E13.5 MEPM cells had weaker osteogenic ability than E15.5, and both MEPM cells exhibited different Lactate dehydrogenase A (LDHA) and Cytochrome c (CytC) expressions in OIM compared to routine medium, suggesting that glycolysis might be associated with the influence of the osteogenic microenvironment on MEPM cells. By comparing the stemness of the two cells, we investigated that the stemness of E13.5 MEPM cells was stronger than that of E15.5 MEPM cells, and E15.5 MEPM cells were more like differentiated cells than stem cells, as their capacity to differentiate into multiple cell fates was reduced. E13.5 MEPM cells might be the precursor cells of E15.5 MEPM cells. Our results enriched the understanding of the effect of the microenvironment on the biological properties of E13.5 and E15.5 MEPM cells, which should be considered when using MEPM cells as a model for palatal studies in the future.
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Affiliation(s)
- Xia Peng
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Jing Chen
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Yijia Wang
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Xiaotong Wang
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Xige Zhao
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Xiaoyu Zheng
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Zhiwei Wang
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Dong Yuan
- Department of Geriatric Dentistry, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China
| | - Juan Du
- Laboratory of Orofacial Development, Laboratory of Molecular Signaling and Stem Cells Therapy, Molecular Laboratory for Gene Therapy and Tooth Regeneration, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China; Department of Geriatric Dentistry, Capital Medical University School of Stomatology, Tiantan Xili No.4, Beijing, 100050, China.
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13
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Okandeji ME, Lijoka AD, Olude MA, Atiba F, Olopade JO. Permanent Tooth Eruption Patterns in Nigerian Local Pigs. J Vet Dent 2023; 40:236-242. [PMID: 36721364 DOI: 10.1177/08987564231152390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Pigs are diphyodonts with heterodont dentition and have been used in studies involving teeth and jawbone regeneration, and dental implants. Patterns of tooth eruption are used to age animals and determine the effects of environmental and genetic influences on occurrence of variations. As with other species, variations exist in the tooth eruption pattern in pigs. The aim of this study was to determine the permanent teeth eruption patterns of Nigerian local pigs. Twenty-six healthy pigs were observed throughout the study period. Pigs were firmly held in dorsal or lateral recumbency and their mouths gently held open to visually examine all quadrants of the dental arches (right and left maxillary, right and left mandibular). Observations were recorded from 16 weeks of age, until the last permanent tooth erupted. Results obtained from the study showed that males had lower mean values for eruption time (54%) of examined teeth in comparison to females. The mean values of eruption time for the maxillary third incisor, the mandibular and maxillary canines, and the mandibular fourth premolar teeth were statistically significant in the males (P = .0017, P = .0088, P = .0002 and P = .0244, respectively). Sixty-nine percent of the adult pigs did not have eruption of the mandibular first premolar, while polydontia was observed in the maxillary and mandibular incisors. These results show that intra-breed and inter-breed variations exist in the dental eruption pattern in pigs. The data obtained from this study can be used for comparative dental studies and can aid further research on the developmental anatomy of Nigerian local pigs.
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Affiliation(s)
- Michael Efeturi Okandeji
- Department of Veterinary Anatomy, Federal University of Abeokuta, Abeokuta, Nigeria
- Department of Veterinary Anatomy, University of Ibadan, Ibadan, Nigeria
| | | | | | - Folusho Atiba
- Department of Anatomy, University of Ibadan, Ibadan, Nigeria
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14
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Heynickx N, Segers C, Coolkens A, Baatout S, Vermeulen K. Characterization of Non-Specific Uptake and Retention Mechanisms of [ 177Lu]Lu-PSMA-617 in the Salivary Glands. Pharmaceuticals (Basel) 2023; 16:ph16050692. [PMID: 37242475 DOI: 10.3390/ph16050692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/28/2023] Open
Abstract
The radionuclide therapy [177Lu]Lu-PSMA-617 was recently FDA-approved for treatment of metastatic castration-resistant prostate cancer. Salivary gland toxicity is currently considered as the main dose-limiting side effect. However, its uptake and retention mechanisms in the salivary glands remain elusive. Therefore, our aim was to elucidate the uptake patterns of [177Lu]Lu-PSMA-617 in salivary gland tissue and cells by conducting cellular binding and autoradiography experiments. Briefly, A-253 and PC3-PIP cells, and mouse kidney and pig salivary gland tissue, were incubated with 5 nM [177Lu]Lu-PSMA-617 to characterize its binding. Additionally, [177Lu]Lu-PSMA-617 was co-incubated with monosodium glutamate, ionotropic or metabotropic glutamate receptor antagonists. Low, non-specific binding was observed in salivary gland cells and tissues. Monosodium glutamate was able to decrease [177Lu]Lu-PSMA-617 in PC3-PIP cells, mouse kidney and pig salivary gland tissue. Kynurenic acid (ionotropic antagonist) decreased the binding of [177Lu]Lu-PSMA-617 to 29.2 ± 20.6% and 63.4 ± 15.4%, respectively, with similar effects observed on tissues. (RS)-MCPG (metabotropic antagonist) was able to decrease the [177Lu]Lu-PSMA-617 binding on A-253 cells to 68.2 ± 16.8% and pig salivary gland tissue to 53.1 ± 36.8%. To conclude, we showed that the non-specific binding on [177Lu]Lu-PSMA-617 could be reduced by monosodium glutamate, kynurenic acid and (RS)-MCPG.
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Affiliation(s)
- Nathalie Heynickx
- Nuclear Medical Applications Institute, Belgian Nuclear Research Centre (SCK CEN), 2400 Mol, Belgium
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
| | - Charlotte Segers
- Nuclear Medical Applications Institute, Belgian Nuclear Research Centre (SCK CEN), 2400 Mol, Belgium
| | - Amelie Coolkens
- Nuclear Medical Applications Institute, Belgian Nuclear Research Centre (SCK CEN), 2400 Mol, Belgium
| | - Sarah Baatout
- Nuclear Medical Applications Institute, Belgian Nuclear Research Centre (SCK CEN), 2400 Mol, Belgium
- Department of Molecular Biotechnology, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium
- Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Koen Vermeulen
- Nuclear Medical Applications Institute, Belgian Nuclear Research Centre (SCK CEN), 2400 Mol, Belgium
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15
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Starch-Jensen T, Spin-Neto R, Veiss-Pedersen P, Dahlin C, Bruun NH, Fink T. Radiographic outcome after maxillary sinus floor augmentation with allogeneic adipose tissue-derived stem cells seeded on deproteinized bovine bone mineral. A randomized controlled experimental study. J Craniomaxillofac Surg 2023; 51:321-331. [PMID: 37355369 DOI: 10.1016/j.jcms.2023.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/01/2023] [Accepted: 05/21/2023] [Indexed: 06/26/2023] Open
Abstract
The objective was to test the hypothesis of no difference in radiographic outcome after maxillary sinus floor augmentation (MSFA) with allogeneic adipose tissue-derived stem cells (ASCs) seeded on deproteinized bovine bone mineral (DBBM) (test) compared with excipient on DBBM (control). Eighteen minipigs were assigned into three groups of six animals and euthanised after one month (T1), two months (T2), and four months (T3), respectively. Each maxillary sinus was randomly allocated to either test or control with an equal volume of graft. Computed tomography scans (CTs) after MSFA (T0) were compared with CTs after euthanasia to evaluate graft volume (GV) changes and bone density (BD) using three-dimensional measurements and Hounsfield units. GV was larger in test compared with control at T1 (P = 0.046), whereas GV was larger in control compared with test at T3 (P = 0.01). BD increased from T0 to T1-T3 (P < 0.001) with both treatments. Higher BD was observed in control compared with test at T3 (P = 0.01), while no significant difference was observed at T1 and T2. Conclusively, the present study demonstrate that allogeneic ASCs seeded on DBBM in conjunction with MSFA seemed not to improve the radiographic outcome compared with excipient on DBBM. However, radiological outcomes need to be supplemented by bone histomorphometry before definitive conclusions can be provided about the beneficial use of allogeneic ASCs seeded on DBBM in conjunction with MSFA compared with DBBM alone.
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Affiliation(s)
- Thomas Starch-Jensen
- Department of Oral and Maxillofacial Surgery, Aalborg University Hospital and Department of Clinical Medicine, The Faculty of Medicine, Aalborg University, Aalborg, Denmark.
| | - Rubens Spin-Neto
- Department of Dentistry and Oral Health, Section of Oral Radiology, Faculty of Health, Aarhus University, Aarhus, Denmark
| | | | - Christer Dahlin
- Department of Biomaterials, BIOMATCELL VINN Excellence Center, Institute for Surgical Science, The Sahlgrenska Academy, University of Gothenburg, and Department of Oral and Maxillofacial Surgery, NU-Hospital, Organization Trollhättan, Gothenburg, Sweden
| | - Niels Henrik Bruun
- Unit of Clinical Biostatistics, Aalborg University Hospital, Aalborg, Denmark
| | - Trine Fink
- Regenerative Medicine Group, Department of Health Science and Technology, The Faculty of Medicine, Aalborg University, Aalborg, Denmark
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16
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Millesi E, Suchyta M, Lachman N, Wang H, Mardini S. Detailed anatomical study of the peripheral motor branches of the facial nerve in the swine model: A novel investigative approach for facial paralysis research. J Plast Reconstr Aesthet Surg 2023; 83:180-188. [PMID: 37276737 DOI: 10.1016/j.bjps.2023.04.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/19/2023] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Large animal models aid in innovating surgical approaches and developing medical devices for the treatment of facial paralysis. However, there is a lack of information on facial nerve anatomy in swine. This study aimed to investigate the branching pattern and histologic characteristics of the swine facial nerve, thereby establishing the anatomical patterns of preclinical models in facial paralysis research. MATERIAL AND METHODS The five peripheral motor branches of the facial nerve were dissected in 30 hemifaces of fresh swine cadavers. Starting at the stylomastoid foramen, the course, branching pattern, and diameter of each motor branch was recorded. Samples were taken at the start of each branch for epoxy embedding, toluidine blue staining, and histomorphologic analysis. RESULTS The dissections demonstrated consistent anatomy of the buccal and marginal mandibular branches in contrast to the temporal and zygomatic branches, which showed more variation in branching patterns. The buccal branch had the largest mean diameter of 1.34 mm (± 0.26 mm), whereas the marginal mandibular branch had the largest fascicular area of 0.558 mm2 (± 0.12 mm2) and highest axon count of 3636.35 (± 526.36). The zygomatic branch had both the smallest diameter of 0.74 mm (± 0.25 mm) and fascicular area of 0.187 mm2 (± 0.14 mm2). CONCLUSIONS The swine facial nerve is anatomically similar to the human facial nerve, making the pig a suitable large animal model. Detailed anatomical and histological information is crucial for developing preclinical models of novel facial nerve reconstruction approaches.
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Affiliation(s)
- Elena Millesi
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Mayo Clinic, Rochester, MN, USA; Paracelsus Medical University, Salzburg, Austria
| | - Marissa Suchyta
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Mayo Clinic, Rochester, MN, USA
| | - Nirusha Lachman
- Department of Clinical Anatomy, Mayo Clinic, Rochester, MN, USA
| | - Huan Wang
- Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, USA.
| | - Samir Mardini
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Mayo Clinic, Rochester, MN, USA
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17
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Okandeji ME, Lijoka AD, Atiba FA, Adebiyi OA, Olopade JO. Dental Disorders in Wild and Domestic Pigs ( Sus Scrofa): A Review. J Vet Dent 2023; 40:47-56. [PMID: 36124401 DOI: 10.1177/08987564221125398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Teeth in the mouth of vertebrates represent the modified descendants of bony dermal plates of ancestral fishes. Dental disorders, which are deviations of dental tissues origins, are derived from any or all of the dental tissues; enamel, dentin or cementum, and include dental abnormalities and diseases. These disorders can be influenced by genetic or environmental factors, or an interplay of both factors. This article reviews disorders that have been reported in both wild and domestic pigs and the frequency of occurrence of these conditions.
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Affiliation(s)
- Michael Efeturi Okandeji
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, 58987University of Ibadan, Ibadan, Nigeria
| | - Ayodeji David Lijoka
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, 58987University of Ibadan, Ibadan, Nigeria
| | - Foluso Ayobami Atiba
- Department of Anatomy, Faculty of Basic Medical Sciences, 58987University of Ibadan, Ibadan, Nigeria
| | | | - James Olukayode Olopade
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, 58987University of Ibadan, Ibadan, Nigeria
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18
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Femi-Akinlosotu O, Olopade FE, Mustapha O, Adekanmbi A, Olopade JO. Morphometric analysis of the spinal cord of the Sus scrofa (large white and landrace crossbreed). Anat Histol Embryol 2023; 52:289-299. [PMID: 36345666 DOI: 10.1111/ahe.12883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/26/2022] [Accepted: 10/25/2022] [Indexed: 11/11/2022]
Abstract
The incidence of spinal cord (SC) injury in developed and undeveloped countries is alarming. The pig (Sus scrofa) has been recommended as a suitable research model for translational studies because of its morphophysiological similarities of organ systems with humans. There is a dearth of information on the SC anatomy of the large white and landrace crossbreed (LW-LC) pigs. We therefore aim to describe the gross morphology and morphometry of its SC. Twelve juvenile LW-LC pigs (six males and six females) were used. The skin and epaxial muscles were dissected to expose the vertebral column. The SC was carefully harvested by laminectomy, and 13 gross SC morphometric parameters were evaluated. Thirty-three spinal nerves were seen emanating from either side of the SC by means of dorsal and ventral spinal roots. The overall average of SC length and weight was 36.23 ± 1.01 cm and 16.60 ± 0.58 g, respectively. However, the mean SC length and weight were higher in females compared with males, with SC weight being statistically significant. A positive relationship between SC length and weight was significant for males (p = 0.0435) but not for females (p = 0.42). Likewise, the strength of the relationship between SC length and weight was significant in males (r = 0.82) but not significant in females (r = 0.41). Baseline data for the morphometric features of the spinal cord in the LW-LC pigs were generated, which will contribute to the knowledge of this species anatomy and useful information on regional anaesthesia that should further strengthen the drive in adopting the pig as a suitable research model for biomedical research.
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Affiliation(s)
| | | | - Oluwaseun Mustapha
- Vertebrate Morphology and Neuroscience Unit, Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Adejoke Adekanmbi
- Department of Anatomy, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - James O Olopade
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
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19
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Cai EZ, Teo NMH, Lee ZP, Yeo JYH, Liu Y, Ong ZX, Hing ACY, Lim TC. Straight-segment mandibulectomy: a reproducible porcine mandibular critical-size defect model. Br J Oral Maxillofac Surg 2023; 61:53-60. [PMID: 36470696 DOI: 10.1016/j.bjoms.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 09/03/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022]
Abstract
Porcine mandibular defect models are commonly used for the preclinical evaluation of reconstruction techniques. Existing studies vary in technique, complexity, and postoperative outcomes. The procedures are complex and often described without sufficient detail. We describe in detail a simple and reproducible method for creating a critical-size mandibular defect in a porcine model. Seven hemimandibular critical size defects were created in five male Yorkshire-Landrace pigs, three with unilateral defects and two with bilateral defects. A transverse incision was made over the mandibular body. Periosteum was incised and elevated to expose the mandibular body and a critical-size defect of 30 × 20 mm created using an oscillating saw. The implant was inserted and fixed with a titanium reconstruction plate and bicortical locking screws, and the wound closed in layers with resorbable sutures. Intraoral contamination was avoided. Dentition was retained and the mental nerve and its branches preserved. The marginal mandibular nerve was not encountered during dissection. All pigs retained normal masticatory function, and there were no cases of infection, wound breakdown, haematoma, salivary leak, or implant-related complications. The procedure can be performed bilaterally on both hemimandibles without affecting load-bearing function. All pigs survived until the end point of three months. Postoperative computed tomographic scans and histology showed new bone formation, and a three-point bend test showed the restoration of biomechanical strength. Straight-segment mandibulectomy is a simple and reproducible method for the creation of critical-size mandibular defects in a porcine model, simulating a load-bearing situation.
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Affiliation(s)
- Elijah Zhengyang Cai
- Division of Plastic, Reconstructive and Aesthetic Surgery, Department of Surgery, National University Hospital, Singapore
| | - Nelson Ming Hao Teo
- Division of Plastic, Reconstructive and Aesthetic Surgery, Department of Surgery, National University Hospital, Singapore
| | - Zhi Peng Lee
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | | | - Yu Liu
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Zhi Xian Ong
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Angela Chai Yin Hing
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Thiam Chye Lim
- Division of Plastic, Reconstructive and Aesthetic Surgery, Department of Surgery, National University Hospital, Singapore; Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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20
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Rodboon T, Souza GR, Mutirangura A, Ferreira JN. Magnetic bioassembly platforms for establishing craniofacial exocrine gland organoids as aging in vitro models. PLoS One 2022; 17:e0272644. [PMID: 35930565 PMCID: PMC9355193 DOI: 10.1371/journal.pone.0272644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 07/22/2022] [Indexed: 11/18/2022] Open
Abstract
A multitude of aging-related factors and systemic conditions can cause lacrimal gland (LG) or salivary gland (SG) hypofunction leading to degenerative dry eye disease (DED) or dry mouth syndrome, respectively. Currently, there are no effective regenerative therapies that can fully reverse such gland hypofunction due to the lack of reproducible in vitro aging models or organoids required to develop novel treatments for multi-omic profiling. Previously, our research group successful developed three-dimensional (3D) bioassembly nanotechnologies towards the generation of functional exocrine gland organoids via magnetic 3D bioprinting platforms (M3DB). To meet the needs of our aging Asian societies, a next step was taken to design consistent M3DB protocols to engineer LG and SG organoid models with aging molecular and pathological features. Herein, a feasible step-by-step protocol was provided for producing both LG and SG organoids using M3DB platforms. Such protocol provided reproducible outcomes with final organoid products resembling LG or SG native parenchymal epithelial tissues. Both acinar and ductal epithelial compartments were prominent (21 ± 4.32% versus 42 ± 6.72%, respectively), and could be clearly identified in these organoids. Meanwhile, these can be further developed into aging signature models by inducing cellular senescence via chemical mutagenesis. The generation of senescence-like organoids will be our ultimate milestone aiming towards high throughput applications for drug screening and discovery, and for gene therapy investigations to reverse aging.
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Affiliation(s)
- Teerapat Rodboon
- Avatar Biotechnologies for Oral Health and Healthy Longevity Research Unit, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Glauco R Souza
- University of Texas Health Sciences Center at Houston, Houston, TX, United States of America
- Nano3D Biosciences Inc., Houston, TX, United States of America
- Greiner Bio-One North America Inc., Monroe, NC, United States of America
| | - Apiwat Mutirangura
- Center of Excellence in Molecular Genetics of Cancer and Human Disease, Department of Anatomy, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Joao N Ferreira
- Avatar Biotechnologies for Oral Health and Healthy Longevity Research Unit, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
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21
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Tohar R, Alali H, Ansbacher T, Brosh T, Sher I, Gafni Y, Weinberg E, Gal M. Collagenase Administration into Periodontal Ligament Reduces the Forces Required for Tooth Extraction in an Ex situ Porcine Jaw Model. J Funct Biomater 2022; 13:jfb13020076. [PMID: 35735930 PMCID: PMC9225053 DOI: 10.3390/jfb13020076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/02/2022] [Accepted: 06/06/2022] [Indexed: 11/16/2022] Open
Abstract
Minimally invasive exodontia is among the long-sought-for development aims of safe dental medicine. In this paper, we aim, for the first time, to examine whether the enzymatic disruption of the periodontal ligament fibers reduces the force required for tooth extraction. To this end, recombinantly expressed clostridial collagenase G variant purified from Escherichia coli was injected into the periodontal ligament of mesial and distal roots of the first and second split porcine mandibular premolars. The vehicle solution was injected into the corresponding roots on the contralateral side. Following sixteen hours, the treated mandibles were mounted on a loading machine to measure the extraction force. In addition, the effect of the enzyme on the viability of different cell types was evaluated. An average reduction of 20% in the applied force (albeit with a large variability of 50 to 370 newton) was observed for the enzymatically treated roots, reaching up to 50% reduction in some cases. Importantly, the enzyme showed only a minor and transient effect on cellular viability, without any signs of toxicity. Using an innovative model enabling the analytical measurement of extraction forces, we show, for the first time, that the enzymatic disruption of periodontal ligament fibers substantially reduces the force required for tooth extraction. This novel technique brings us closer to atraumatic exodontia, potentially reducing intra- and post-operative complications and facilitating subsequent implant placement. The development of novel enzymes with enhanced activity may further simplify the tooth extraction process and present additional clinical relevance for the broad range of implications in the oral cavity.
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Affiliation(s)
- Ran Tohar
- Department of Oral Biology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (R.T.); (H.A.); (T.A.); (T.B.); (I.S.)
| | - Hen Alali
- Department of Oral Biology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (R.T.); (H.A.); (T.A.); (T.B.); (I.S.)
| | - Tamar Ansbacher
- Department of Oral Biology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (R.T.); (H.A.); (T.A.); (T.B.); (I.S.)
- Hadassah Academic College, Jerusalem 91010, Israel
| | - Tamar Brosh
- Department of Oral Biology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (R.T.); (H.A.); (T.A.); (T.B.); (I.S.)
| | - Inbal Sher
- Department of Oral Biology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (R.T.); (H.A.); (T.A.); (T.B.); (I.S.)
| | - Yossi Gafni
- Department of Orthodontics, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel;
| | - Evgeny Weinberg
- Department of Oral Biology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (R.T.); (H.A.); (T.A.); (T.B.); (I.S.)
- Department of Periodontology and Oral Implantology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Correspondence: (E.W.); (M.G.)
| | - Maayan Gal
- Department of Oral Biology, Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (R.T.); (H.A.); (T.A.); (T.B.); (I.S.)
- Correspondence: (E.W.); (M.G.)
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22
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Chen CF, Chen CM, Chen HS, Huang WC, Chen YC, Chang HC, Liu SH, Yang TL, Wang LL, Chen PH. The Use of Customized Three-Dimensionally Printed Mandible Prostheses with a Pressure-Reducing Device: A Finite Element Analysis in Different Chewing Positions, Biomechanical Testing, and In Vivo Animal Study Using Lanyu Pigs. BIOMED RESEARCH INTERNATIONAL 2022; 2022:9880454. [PMID: 35342763 PMCID: PMC8942632 DOI: 10.1155/2022/9880454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 02/06/2022] [Accepted: 02/11/2022] [Indexed: 01/05/2023]
Abstract
Segmental bony defects of the mandible constitute a complete loss of the regional part of the mandible. Although several types of customized three-dimension-printed mandible prostheses (CMPs) have been developed, this technique has yet to be widely used. We used CMP with a pressure-reducing device (PRD) to investigate its clinical applicability. First, we used the finite element analysis (FEA). We designed four models of CMP (P1 to P4), and the result showed that CMP with posterior PRD deployment (P4 group) had the maximum total deformation in the protrusion and right excursion positions, and in clenching and left excursion positions, posterior screws had the minimum von Mises stress. Second, the P4 CMP-PRD was produced using LaserCUSING from titanium alloy (Ti-6Al-4V). The fracture test result revealed that the maximum static pressure that could be withstood was 189 N, and a fatigue test was conducted for 5,000,000 cycles. Third, animal study was conducted on five male 4-month-old Lanyu pigs. Four animals completed the experiment. Two animals had CMP exposure in the oral cavity, but there was no significant inflammation, and one animal had a rear wing fracture. According to a CT scan, the lingual cortex of the mandible crawled along the CMP surface, and a bony front-to-back connection was noted in one animal. A histological examination indicated that CMP was significantly less reactive than control materials (p = 0.0170). Adequate PRD deployment in CMP may solve a challenge associated with CMP, thus promoting its use in clinical practice.
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Affiliation(s)
- Chun-Feng Chen
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Oral and Maxillofacial Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- Dental Laboratory Technology, Shu Zen College of Medicine and Management, Kaohsiung, Taiwan
| | - Chun-Ming Chen
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Han-Sheng Chen
- Dental Department, Kaohsiung Municipal Siaogang Hospital, Kaohsiung, Taiwan
| | - Wei-Chin Huang
- Laser and Additive Manufacturing Technology Center, Industrial Technology Research Institute, Taiwan
| | - Yung-Chung Chen
- School of Dentistry and Institute of Oral Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hung-Chih Chang
- Department of biomedical engineering, Hungkuang University, Taichung, Taiwan
| | - Sung-Ho Liu
- Laser and Additive Manufacturing Technology Center, Industrial Technology Research Institute, Taiwan
| | - Tsung-Lung Yang
- KSVGH Originals & Enterprises, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Ling-Lin Wang
- KSVGH Originals & Enterprises, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Ping-Ho Chen
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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23
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Musskopf ML, Finger Stadler A, Wikesjö UME, Susin C. The minipig intraoral dental implant model: A systematic review and meta-analysis. PLoS One 2022; 17:e0264475. [PMID: 35226690 PMCID: PMC8884544 DOI: 10.1371/journal.pone.0264475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/10/2022] [Indexed: 12/09/2022] Open
Abstract
OBJECTIVES The objective of this report was to provide a review of the minipig intraoral dental implant model including a meta-analysis to estimate osseointegration and crestal bone remodeling. METHODS A systematic review including PubMed and EMBASE databases through June 2021 was conducted. Two independent examiners screened titles/abstracts and selected full-text articles. Studies evaluating titanium dental implant osseointegration in native alveolar bone were included. A quality assessment of reporting was performed. Random-effects meta-analyses and meta-regressions were produced for bone-implant contact (BIC), first BIC, and crestal bone level. RESULTS 125 out of 249 full-text articles were reviewed, 55 original studies were included. Quality of reporting was generally low, omissions included animal characteristics, examiner masking/calibration, and sample size calculation. The typical minipig model protocol included surgical extraction of the mandibular premolars and first molar, 12±4 wks post-extraction healing, placement of three narrow regular length dental implants per jaw quadrant, submerged implant healing and 8 wks of osseointegration. Approximately 90% of studies reported undecalcified incandescent light microscopy histometrics. Overall, mean BIC was 59.88% (95%CI: 57.43-62.33). BIC increased significantly over time (p<0.001): 40.93 (95%CI: 34.95-46.90) at 2 wks, 58.37% (95%CI: 54.38-62.36) at 4 wks, and 66.33% (95%CI: 63.45-69.21) beyond 4 wks. Variability among studies was mainly explained by differences in observation interval post-extraction and post-implant placement, and implant surface. Heterogeneity was high for all studies (I2 > 90%, p<0.001). CONCLUSIONS The minipig intraoral dental implant model appears to effectively demonstrate osseointegration and alveolar bone remodeling similar to that observed in humans and canine models.
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Affiliation(s)
- Marta Liliana Musskopf
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Amanda Finger Stadler
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Ulf ME Wikesjö
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Cristiano Susin
- Division of Comprehensive Oral Health–Periodontology, Laboratory for Applied Periodontal & Craniofacial Research, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
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24
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Enhancing Stability and Mucoadhesive Properties of Chitosan Nanoparticles by Surface Modification with Sodium Alginate and Polyethylene Glycol for Potential Oral Mucosa Vaccine Delivery. Mar Drugs 2022; 20:md20030156. [PMID: 35323455 PMCID: PMC8953124 DOI: 10.3390/md20030156] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/15/2022] [Accepted: 02/18/2022] [Indexed: 02/01/2023] Open
Abstract
Background: The present study aimed to fabricate surface-modified chitosan nanoparticles with two mucoadhesive polymers (sodium alginate and polyethylene glycol) to optimize their protein encapsulation efficiency, improve their mucoadhesion properties, and increase their stability in biological fluids. Method: Ionotropic gelation was employed to formulate chitosan nanoparticles and surface modification was performed at five different concentrations (0.05, 0.1, 0.2, 0.3, 0.4% w/v) of sodium alginate (ALG) and polyethylene glycol (PEG), with ovalbumin (OVA) used as a model protein antigen. The functional characteristics were examined by dynamic light scattering (DLS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM)/scanning transmission electron microscopy (STEM). Stability was examined in the presence of simulated gastric and intestinal fluids, while mucoadhesive properties were evaluated by in vitro mucin binding and ex vivo adhesion on pig oral mucosa tissue. The impact of the formulation and dissolution process on the OVA structure was investigated by sodium dodecyl-polyacrylamide gel electrophoresis (SDS-PAGE) and circular dichroism (CD). Results: The nanoparticles showed a uniform spherical morphology with a maximum protein encapsulation efficiency of 81%, size after OVA loading of between 200 and 400 nm and zeta potential from 10 to 29 mV. An in vitro drug release study suggested successful nanoparticle surface modification by ALG and PEG, showing gastric fluid stability (4 h) and a 96 h sustained OVA release in intestinal fluid, with the nanoparticles maintaining their conformational stability (SDS-PAGE and CD analyses) after release in the intestinal fluid. An in vitro mucin binding study indicated a significant increase in mucin binding from 41 to 63% in ALG-modified nanoparticles and a 27–49% increase in PEG-modified nanoparticles. The ex vivo mucoadhesion showed that the powdered particles adhered to the pig oral mucosa. Conclusion: The ALG and PEG surface modification of chitosan nanoparticles improved the particle stability in both simulated gastric and intestinal fluids and improved the mucoadhesive properties, therefore constituting a potential nanocarrier platform for mucosal protein vaccine delivery.
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25
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Unnikrishnan PS, Iyer S, Manju V, Reshmi CR, Menon D, Nair SV, Nair M. Nanocomposite fibrous scaffold mediated mandible reconstruction and dental rehabilitation: An experimental study in pig model. BIOMATERIALS ADVANCES 2022; 133:112631. [PMID: 35527156 DOI: 10.1016/j.msec.2021.112631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/09/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Mandible reconstruction and dental rehabilitation after trauma or tumor resection represent a serious challenge for maxillofacial surgeons. This study aimed to investigate the bone formation potential of nanocomposite fibrous scaffold (silica-nanohydroxyapatite-gelatin reinforced with poly L-lactic acid yarns - CSF) for delayed Titanium (Ti) implantation, which was compared to autograft (AG) taken from the iliac crest. The grafts were placed in critical-sized mandibular defects in an adult pig model for 6 months followed by dental implant placement for another 3 months. There was complete union and vascularised lamellar bone formation within 6 months. Moreover, the biological processes associated with angiogenesis, bone maturation and remodelling were seen in CSF, which was comparable to AG. Later, when Ti dental implant was placed on newly formed bone, CSF group demonstrated better osseointegration. In short, nanocomposite fibrous scaffold promoted quality bone formation in mandible defect that leads to successful osseointegration, suggesting as a potential candidate for implant-based rehabilitation in clinics in future.
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Affiliation(s)
- P S Unnikrishnan
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India
| | - Subramania Iyer
- Centre for Plastic and Reconstructive Surgery, Amrita Institute of Medical Science and Research Centre, Kochi 682041, India
| | - V Manju
- School of Dentistry, Amrita Institute of Medical Science and Research Centre, Kochi 682041, India
| | - C R Reshmi
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India
| | - Deepthy Menon
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India
| | - Shantikumar V Nair
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India
| | - Manitha Nair
- Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi 682041, India.
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26
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Lunney JK, Van Goor A, Walker KE, Hailstock T, Franklin J, Dai C. Importance of the pig as a human biomedical model. Sci Transl Med 2021; 13:eabd5758. [PMID: 34818055 DOI: 10.1126/scitranslmed.abd5758] [Citation(s) in RCA: 242] [Impact Index Per Article: 80.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Joan K Lunney
- Animal Parasitic Diseases Laboratory, BARC, NEA, ARS, USDA, Beltsville, MD 20705, USA
| | - Angelica Van Goor
- Animal Parasitic Diseases Laboratory, BARC, NEA, ARS, USDA, Beltsville, MD 20705, USA
| | - Kristen E Walker
- Animal Parasitic Diseases Laboratory, BARC, NEA, ARS, USDA, Beltsville, MD 20705, USA
| | - Taylor Hailstock
- Animal Parasitic Diseases Laboratory, BARC, NEA, ARS, USDA, Beltsville, MD 20705, USA
| | - Jasmine Franklin
- Animal Parasitic Diseases Laboratory, BARC, NEA, ARS, USDA, Beltsville, MD 20705, USA
| | - Chaohui Dai
- Animal Parasitic Diseases Laboratory, BARC, NEA, ARS, USDA, Beltsville, MD 20705, USA.,College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu 225009, China
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27
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Afuwape OF, Runge J, Bentil SA, Jiles DC. Comparison of Coil Designs for Transcranial Magnetic Stimulation of a Pig Model. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2021; 2021:1535-1538. [PMID: 34891576 DOI: 10.1109/embc46164.2021.9629707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Transcranial Magnetic Stimulation (TMS) is a modulation tool that is non-invasive and used to treat neuropsychiatric disorders. Over the last decade, TMS has been approved by the United States Food and Drug Administration (FDA) for the treatment of Major Depressive Disorders (MDD) and Obsessive-Compulsive Disorder (OCD). TMS is based on Faraday's law of electromagnetic induction, involving the generation of time-varying magnetic fields from electromagnetic coils when intense pulses of current flow through the coils. This transient magnetic field, in turn, induces an electric field within the brain, which results in excitation or inhibition of the brain's neurons. Several coil designs have been proposed for achieving targeted stimulation at great depth within the brain. With the advancement in TMS technology, there is a need for preclinical studies and testing of proposed coil designs. Using animal models to conduct these preclinical studies becomes of utmost importance, especially since a successful animal trial precedes a human clinical trial. In this research, the authors model six different coil designs for an anatomically heterogeneous adult pig model. The magnetic field intensity, H (A/m), and electric field intensity, E (V/m), were calculated and compared for each coil configuration. The maximum induced electric field in the scalp and brain (grey matter) were compared for all the different coil configurations. The electric field distribution as a function of depth within the brain was also compared for the different coil configurations.Clinical Relevance- This study will be beneficial to TMS coil designers and researchers to treat neuropsychiatric disorders and in the preclinical development of TMS coils. Results from studies with pig models are easy to compare with that of humans, and this will help to guide our understanding of the mechanism of TMS.
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28
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Dewey MJ, Milner DJ, Weisgerber D, Flanagan CL, Rubessa M, Lotti S, Polkoff KM, Crotts S, Hollister SJ, Wheeler MB, Harley BAC. Repair of critical-size porcine craniofacial bone defects using a collagen-polycaprolactone composite biomaterial. Biofabrication 2021; 14. [PMID: 34663761 DOI: 10.1088/1758-5090/ac30d5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 10/18/2021] [Indexed: 12/16/2022]
Abstract
Regenerative medicine approaches for massive craniomaxillofacial (CMF) bone defects face challenges associated with the scale of missing bone, the need for rapid graft-defect integration, and challenges related to inflammation and infection. Mineralized collagen scaffolds have been shown to promote mesenchymal stem cell osteogenesis due to their porous nature and material properties, but are mechanically weak, limiting surgical practicality. Previously, these scaffolds were combined with 3D-printed polycaprolactone (PCL) mesh to form a scaffold-mesh composite to increase strength and promote bone formation in sub-critical sized porcine ramus defects. Here, we compare the performance of mineralized collagen-PCL composites to the PCL mesh in a critical-sized porcine ramus defect model. While there were no differences in overall healing response between groups, our data demonstrated broadly variable metrics of healing regarding new bone infiltration and fibrous tissue formation. Abscesses were present surrounding some implants and PCL polymer was still present after 9-10 months of implantation. Overall, while there was limited successful healing, with 2 of 22 implants showed substantial levels of bone regeneration, and others demonstrating some form of new bone formation, the results suggest targeted improvements to improve repair of large animal models to more accurately represent CMF bone healing. Notably, strategies to increase osteogenesis throughout the implant, modulate the immune system to support repair, and employ shape-fitting tactics to avoid implant micromotion and resultant fibrosis. Improvements to the mineralized collagen scaffolds involve changes in pore size and shape to increase cell migration and osteogenesis and inclusion or delivery of factors to aid vascular ingrowth and bone regeneration.
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Affiliation(s)
- Marley J Dewey
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
| | - Derek J Milner
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
| | - Daniel Weisgerber
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
| | - Colleen L Flanagan
- Department of Bioengineering, University of Michigan, Ann Arbor, MI, 30332, United States of America
| | - Marcello Rubessa
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
| | - Sammi Lotti
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
| | - Kathryn M Polkoff
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
| | - Sarah Crotts
- Center for 3D Medical Fabrication, Wallace A. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, United States of America
| | - Scott J Hollister
- Center for 3D Medical Fabrication, Wallace A. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, United States of America
| | - Matthew B Wheeler
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
| | - Brendan A C Harley
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America.,Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
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29
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Nagy E, Braunitzer G, Gryschka DG, Barrak I, Antal MA. Accuracy of digitally planned, guided apicoectomy with a conventional trephine and a custom-made endodontic trephine: An in vitro comparative study. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2021; 123:388-394. [PMID: 34601166 DOI: 10.1016/j.jormas.2021.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/27/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE Static guided trephine apicoectomy has been developed as a less invasive and more accurate alternative to conventional freehand apicoectomy with drills. Overpenetration is a frequent issue with this procedure, which deteriorates accuracy and raises safety concerns. A safety improvement to address this problem is presented. MATERIALS AND METHODS Guided apicoectomies were performed in porcine mandibles with either a conventional bone trephine or a custom-made endo-trephine with built-in depth control. The deviation of the apical endpoint of the trephine from the digital surgical plan was analyzed. Overpenetration frequency was recorded. RESULTS Procedures performed with the custom trephine were significantly more accurate both along the x-axis and globally, but no significant difference was found for the y and z axes. Overpenetration frequency was 70% in the conventional trephine group versus 38% in the stop trephine group. CONCLUSION The results indicate that the lack of physical depth control can interfere with the accuracy (and safety) of these procedures to a significant extent, as visual cues (such as the depth markings on a conventional trephine) are insufficient to prevent overpenetration. Our results show that custom-made trephines with a built-in stop offer an optimal solution for this problem.
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Affiliation(s)
- Eszter Nagy
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, Szeged, Hungary
| | | | - Dániel Gerhard Gryschka
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, Szeged, Hungary
| | - Ibrahim Barrak
- Faculty of Medicine, Department of Oral and Maxillofacial Surgery, University of Szeged, Szeged, Hungary
| | - Mark Adam Antal
- Department of Operative and Esthetic Dentistry, Faculty of Dentistry, University of Szeged, Szeged, Hungary; Department of Preventive and Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, UAE.
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30
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Magalhães HIR, Barcelos JB, Romão FB, Borges TRJ, Carvalho-Barros RAD, Miglino MA, Silva FOCE, Ribeiro LDA. Comparative study of the digastric and the stylohyoid muscles between wild boars ( Sus scrofa scrofa) and domestic swine ( Sus scrofa domesticus): revisiting the gross anatomy. Anat Cell Biol 2021; 54:202-211. [PMID: 33850060 PMCID: PMC8225471 DOI: 10.5115/acb.20.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/12/2021] [Accepted: 01/13/2021] [Indexed: 11/27/2022] Open
Abstract
Considering Suidae Familie as a perfect and viable experimental biomedical model for research applied to human medicine, it has been sought to describe the comparative anatomy of the digastric and the stylohyoid muscles between boars and domestic swine. Heads of Sus scrofa scrofa and Sus scrofa domesticus were dissected. The digastric muscle presented only one muscle belly as anatomical component of a tendinous origin in the jugular process of the occipital bone, and muscle insertion in the midventral edge of the caudal two thirds of the body of the mandible. Thus, its function is fundamentally associated with the lowering and the retracting of the mandible which, by the way, can deliver greater muscle power at lesser energy expense. For the stylohyoid muscle, the tendinous origin was in the laterocaudal edge of the dorsal third of the stylohyoid bone. The muscle insertion - primarily, was in the lateral and caudal edges from the mid third portion up to the ventral extremity of the thyrohyoid bone, and secondarily as a laterolateral aponeurotic blade which would unite, in a bilateral manner, an insertion that was common to the sternohyoid, the geniohyoid, and the mylohyoid muscles in a median ventral region. This morphology were similar to the two specimens studied expanding the information available, which were completely unknown for the suidae until the moment.
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Affiliation(s)
| | - Jeferson Borges Barcelos
- Animal Anatomy Laboratory, School of Veterinary Medicine and Animal Sciences, Federal University of Uberl?ndia, Uberl?ndia, Brazil
| | - Fabiano Braz Romão
- Animal Anatomy Laboratory, School of Veterinary Medicine, University Center of Patos de Minas, Patos de Minas, Brazil
| | - Tânia Ribeiro Junqueira Borges
- Animal Anatomy Laboratory, School of Veterinary Medicine and Animal Sciences, Federal University of Uberl?ndia, Uberl?ndia, Brazil
| | | | - Maria Angelica Miglino
- Department of Surgery, School of Veterinary Medicine and Animal Sciences, University of S?o Paulo, S?o Paulo, Brazil
| | | | - Lucas de Assis Ribeiro
- Animal Anatomy Laboratory, School of Veterinary Medicine and Animal Sciences, Federal University of Uberl?ndia, Uberl?ndia, Brazil
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31
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Mangione F, Salmon B, EzEldeen M, Jacobs R, Chaussain C, Vital S. Characteristics of Large Animal Models for Current Cell-Based Oral Tissue Regeneration. TISSUE ENGINEERING PART B-REVIEWS 2021; 28:489-505. [PMID: 33882717 DOI: 10.1089/ten.teb.2020.0384] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The recent advances in the field of cell-based therapeutics open promising perspectives for oral tissue regeneration. The development of large animal models, which overcome the limits of the rodent models and allow to emulate clinical situations, is crucial for the validation of regenerative strategies to move toward clinical application. Currently, porcine, canine, and ovine models are mainly developed for oral regeneration and their specific characteristics have an impact on the outcomes of the studies. Thus, this systematic review investigates the application of porcine, canine, and ovine models in present cell-based oral regeneration, according to the species characteristics and the targeted tissue to regenerate. A customized search of PubMed, EMBASE, Scopus, and Web of Science databases from January 2015 to March 2020 was conducted. Relevant articles about cell-based oral tissues engineering in porcine, canine, and ovine models were evaluated. Among the evaluated articles, 58 relevant studies about cell-based oral regeneration in porcine, canine, and ovine models matched the eligibility criteria and were selected for full analysis. Porcine models, the most similar species with humans, were mostly used for bone and periodontium regeneration; tooth regeneration was reported only in pig, except for one study in dog. Canine models were the most transversal models, successfully involved for all oral tissue regeneration and notably in implantology. However, differences with humans and ethical concerns affect the use of these models. Ovine models, alternative to porcine and canine ones, were mainly used for bone and, scarcely, periodontium regeneration. The anatomy and physiology of these animals restrain their involvement. If consistency was found in defect specificities and cell trends among different species animal models of bone, dentin-pulp complex, or tooth regeneration, variability appeared in periodontium. Regeneration assessment methods were more elaborate in porcines and canines than in ovines. Risk of bias was low for selection, attrition and reporting, but unclear for performance and detection. Overall, if none of the large animal models can be considered an ideal one, they are of deemed importance for oral cell-based tissue engineering and researchers should consider their relevance to establish favorable conditions for a given preclinical cell-based therapeutics.
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Affiliation(s)
- Francesca Mangione
- URP 2496 Laboratory Orofacial Pathologies, Imaging and Biotherapies, Life Imaging Platform (PIV), UFR Odontology, Université de Paris, Montrouge, France.,Henri Mondor Hospital, AP-HP, Créteil, France
| | - Benjamin Salmon
- URP 2496 Laboratory Orofacial Pathologies, Imaging and Biotherapies, Life Imaging Platform (PIV), UFR Odontology, Université de Paris, Montrouge, France.,Bretonneau Hospital, AP-HP, Paris, France.,Reference Center for Rare Disorders of the Calcium and Phosphate Metabolism, Filière OSCAR, AP-HP, Paris, France
| | - Mostafa EzEldeen
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.,Maxillofacial Surgery Department, University Hospitals Leuven, Leuven, Belgium.,Department of Oral Health Sciences, KU Leuven and Paediatric Dentistry and Special Dental Care, University Hospitals Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium.,Maxillofacial Surgery Department, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Catherine Chaussain
- URP 2496 Laboratory Orofacial Pathologies, Imaging and Biotherapies, Life Imaging Platform (PIV), UFR Odontology, Université de Paris, Montrouge, France.,Bretonneau Hospital, AP-HP, Paris, France.,Reference Center for Rare Disorders of the Calcium and Phosphate Metabolism, Filière OSCAR, AP-HP, Paris, France
| | - Sibylle Vital
- URP 2496 Laboratory Orofacial Pathologies, Imaging and Biotherapies, Life Imaging Platform (PIV), UFR Odontology, Université de Paris, Montrouge, France.,AP-HP, Hôpital Louis Mourier, DMU ESPRIT, Colombes, France
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Bouyer M, Garot C, Machillot P, Vollaire J, Fitzpatrick V, Morand S, Boutonnat J, Josserand V, Bettega G, Picart C. 3D-printed scaffold combined to 2D osteoinductive coatings to repair a critical-size mandibular bone defect. Mater Today Bio 2021; 11:100113. [PMID: 34124641 PMCID: PMC8173095 DOI: 10.1016/j.mtbio.2021.100113] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/20/2021] [Accepted: 04/24/2021] [Indexed: 02/03/2023] Open
Abstract
The reconstruction of large bone defects (12 cm3) remains a challenge for clinicians. We developed a new critical-size mandibular bone defect model on a minipig, close to human clinical issues. We analyzed the bone reconstruction obtained by a 3D-printed scaffold made of clinical-grade polylactic acid (PLA), coated with a polyelectrolyte film delivering an osteogenic bioactive molecule (BMP-2). We compared the results (computed tomography scans, microcomputed tomography scans, histology) to the gold standard solution, bone autograft. We demonstrated that the dose of BMP-2 delivered from the scaffold significantly influenced the amount of regenerated bone and the repair kinetics, with a clear BMP-2 dose-dependence. Bone was homogeneously formed inside the scaffold without ectopic bone formation. The bone repair was as good as for the bone autograft. The BMP-2 doses applied in our study were reduced 20- to 75-fold compared to the commercial collagen sponges used in the current clinical applications, without any adverse effects. Three-dimensional printed PLA scaffolds loaded with reduced doses of BMP-2 may be a safe and simple solution for large bone defects faced in the clinic.
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Affiliation(s)
- M. Bouyer
- CEA, CNRS, Université de Grenoble Alpes, ERL5000 BRM, IRIG Institute, 17 Rue des Martyrs, F-38054, Grenoble, France
- CNRS and Grenoble Institute of Engineering, UMR5628, LMGP, 3 Parvis Louis Néel, F-38016, Grenoble, France
- Université Grenoble Alpes, Institut Albert Bonniot, F-38000, Grenoble, France
- Clinique Générale d’Annecy, 4 Chemin de la Tour la Reine, 74000, Annecy, France
| | - C. Garot
- CEA, CNRS, Université de Grenoble Alpes, ERL5000 BRM, IRIG Institute, 17 Rue des Martyrs, F-38054, Grenoble, France
- CNRS and Grenoble Institute of Engineering, UMR5628, LMGP, 3 Parvis Louis Néel, F-38016, Grenoble, France
| | - P. Machillot
- CEA, CNRS, Université de Grenoble Alpes, ERL5000 BRM, IRIG Institute, 17 Rue des Martyrs, F-38054, Grenoble, France
- CNRS and Grenoble Institute of Engineering, UMR5628, LMGP, 3 Parvis Louis Néel, F-38016, Grenoble, France
| | - J. Vollaire
- Université Grenoble Alpes, Institut Albert Bonniot, F-38000, Grenoble, France
- INSERM U1209, Institut Albert Bonniot, F-38000, Grenoble, France
| | - V. Fitzpatrick
- CNRS and Grenoble Institute of Engineering, UMR5628, LMGP, 3 Parvis Louis Néel, F-38016, Grenoble, France
| | - S. Morand
- CEA, CNRS, Université de Grenoble Alpes, ERL5000 BRM, IRIG Institute, 17 Rue des Martyrs, F-38054, Grenoble, France
- CNRS and Grenoble Institute of Engineering, UMR5628, LMGP, 3 Parvis Louis Néel, F-38016, Grenoble, France
- Service de Chirurgie Maxillo-faciale, Centre Hospitalier Annecy Genevois, 1 Avenue de l'hôpital, 74370, Epagny Metz-Tessy, France
| | - J. Boutonnat
- Unité Médico-technique d’Histologie Cytologie Expérimentale, Faculté de Médecine, Université Joseph Fourier, 38700, La Tronche, France
- Département d’Anatomie et Cytologie Pathologique, Institut de Biologie et de Pathologie, Centre Hospitalier Universitaire de Grenoble, France
| | - V. Josserand
- Université Grenoble Alpes, Institut Albert Bonniot, F-38000, Grenoble, France
- INSERM U1209, Institut Albert Bonniot, F-38000, Grenoble, France
| | - G. Bettega
- Université Grenoble Alpes, Institut Albert Bonniot, F-38000, Grenoble, France
- INSERM U1209, Institut Albert Bonniot, F-38000, Grenoble, France
- Service de Chirurgie Maxillo-faciale, Centre Hospitalier Annecy Genevois, 1 Avenue de l'hôpital, 74370, Epagny Metz-Tessy, France
- Corresponding author.
| | - C. Picart
- CEA, CNRS, Université de Grenoble Alpes, ERL5000 BRM, IRIG Institute, 17 Rue des Martyrs, F-38054, Grenoble, France
- CNRS and Grenoble Institute of Engineering, UMR5628, LMGP, 3 Parvis Louis Néel, F-38016, Grenoble, France
- Institut Universitaire de France, 1 Rue Descartes, 75231, Paris Cedex 05, France
- Corresponding author.
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A Cell-Based Approach to Dental Pulp Regeneration Using Mesenchymal Stem Cells: A Scoping Review. Int J Mol Sci 2021; 22:ijms22094357. [PMID: 33921924 PMCID: PMC8122243 DOI: 10.3390/ijms22094357] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/18/2021] [Accepted: 04/20/2021] [Indexed: 02/07/2023] Open
Abstract
Despite the recent explosion of investigations on dental pulp regeneration using various tissue engineering strategies, the translation of the findings from such studies into therapeutic applications has not been properly achieved. The purpose of this scoping review was to systematically review the efficacy of mesenchymal stem cell transplantation for dental pulp regeneration. A literature search was conducted using five electronic databases from their inception to January 2021 and supplemented by hand searches. A total of 17 studies, including two clinical trials and 15 animal studies using orthotopic pulp regeneration models, were included for the review. The risk of bias for the individual studies was assessed. This scoping review demonstrated that the regeneration of vascularized pulp-like tissue was achieved using the stem cell transplantation strategy in animal models. Autologous cell transplantation in two clinical studies also successfully regenerated vascularized vital tissue. Dental pulp stem cell subpopulations, such as mobilized dental pulp stem cells, injectable scaffolds such as atelocollagen, and a granulocyte-colony forming factor, were the most commonly used for pulp regeneration. The overall risk of bias was unclear for animal studies and was moderate or judged to raise some concerns for clinical studies. More high-quality clinical studies are needed to further determine the safety and efficacy of the stem cell transplantation strategy for dental pulp regeneration.
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Ma Z, Zhou M, Wang L, Cheng Q, Hong J. Establishment of Pulp Damage Repair Models in Miniature Pigs Using Diode Lasers. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2021; 39:369-377. [PMID: 33885356 DOI: 10.1089/photob.2020.4959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Objective: To establish a controlled pulp damage repair model in miniature pigs by using a diode laser. Background: Laser is a novel kind of controllable energy, and it is widely used in dentistry. Methods: The premolars of four 24- to 28-month-old miniature pigs were divided into three laser groups, according to the output powers of a diode laser, and the nonirradiated first molars acted as controls. The teeth in laser groups were irradiated under three parameters (output powers 1.5, 2.5, 4 W, continuous wave, frequency 50 Hz for 60 sec). The dental and gingival morphology was observed at 0, 7, 14, and 21 days after laser irradiation. The animals were sacrificed for qualitative and quantitative pulp histopathological analysis. Results: The three laser groups present no seriously irreversible dental and gingival damage. In the 1.5-W group, dental pulp exhibited angiectasis and hyperemia with no inflammation, and did not significantly differ with the control groups at 21 days (p > 0.05). In the 2.5-W group, pulpal inflammation was highest at 7 days and then decreased significantly at 21 days, and the tissue repair appeared at 14 days (p < 0.05). In the 4-W group, pulpal inflammation was significantly highest at 7 days, with an increase in the degree of tissue repair (p < 0.05). Conclusions: The output power of 1.5 W developed a reversible pulpitis model; the output powers of 2.5 and 4 W within 7 days led to the development of irreversible pulpitis models, which proceeded as chronic pulpitis with obvious tissue repair.
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Affiliation(s)
- Zhifei Ma
- Stomatology Special Consultation Clinic, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Oral Disease, Shanghai, China.,Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - Mengqi Zhou
- National Clinical Research Center for Oral Disease, Shanghai, China.,Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China.,Department of Second Dental Clinic, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lizhen Wang
- National Clinical Research Center for Oral Disease, Shanghai, China.,Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China.,Department of Oral Pathology, and Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qing Cheng
- National Clinical Research Center for Oral Disease, Shanghai, China.,Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China.,Department of Endodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jin Hong
- Stomatology Special Consultation Clinic, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,National Clinical Research Center for Oral Disease, Shanghai, China.,Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
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Hugo J, Koldsland OC, Aass AM, Tiainen H. Development and initial testing of an in vitro model simulating class II furcation defects. Clin Exp Dent Res 2021; 7:179-188. [PMID: 33283478 PMCID: PMC8019757 DOI: 10.1002/cre2.346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 09/10/2020] [Accepted: 09/19/2020] [Indexed: 01/29/2023] Open
Abstract
OBJECTIVE To compare surface topography of porcine and human root dentin and to develop a new in vitro model for class II furcation defects. The hypothesis for this study was that porcine mandible blocks can function as a model for class II furcation defects. BACKGROUND Treatment of mandibular class II furcation defects is unpredictable. There is a need for in vitro models to investigate new treatment methods. METHODS A model to investigate the surface topography of porcine and human root dentin was developed and the two tissues compared by SEM imaging and profilometer. A novel method for studying class II furcation defects was then tested. Blocks of porcine mandibles with molar 3 were prepared. Buccal class II furcation defects were created. The furcation area was isolated and bioluminescent Staphylococcus epidermidis Xen43 was used to form a biofilm in the furcation area to test the functionality of the novel furcation model. RESULTS Micromechanical damage caused by debridement on porcine and human root dentin showed similar pattern. No significant difference in the surface morphological parameters was observed between the corresponding porcine and human samples. The model allowed for assessment of the root surface inside the furcation area. While the number of viable bacteria in the furcation following debridement could be quantified, no significant difference between the treatment groups was detected, likely due to bacterial colonization within the periodontal ligament space. CONCLUSION Porcine and human root dentin show similar surface topography following surface debridement. Porcine mandible blocks can function as a model for class II furcation defects. However, further development and refinement of the novel in vitro model is warranted.
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Affiliation(s)
- Jørgen Hugo
- Department of Periodontology, Institute of Clinical DentistryUniversity of OsloOsloNorway
- Department of Biomaterials, Institute of Clinical DentistryUniversity of OsloOsloNorway
| | - Odd Carsten Koldsland
- Department of Periodontology, Institute of Clinical DentistryUniversity of OsloOsloNorway
| | - Anne Merete Aass
- Department of Periodontology, Institute of Clinical DentistryUniversity of OsloOsloNorway
| | - Hanna Tiainen
- Department of Biomaterials, Institute of Clinical DentistryUniversity of OsloOsloNorway
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Kim JK, Cho SW, Kim H, Jo SC, Kim HG, Won TB, Kim JW, Lim JH, Rhee CS. Development of HIGH-INTENSITY FOCUSED ULTRASOUND(HIFU) Therapy in Inferior Turbinate Hypertrophy. Clin Exp Otorhinolaryngol 2021; 15:160-167. [PMID: 33781059 PMCID: PMC9149228 DOI: 10.21053/ceo.2020.02383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 03/09/2021] [Indexed: 11/25/2022] Open
Abstract
Objectives Inferior turbinate (IT) hypertrophy is the main cause of chronic nasal obstruction. We developed a high-intensity focused ultrasound (HIFU) ablation device to treat patients with IT hypertrophy. Methods First, computed tomography images of patients with no evidence of sinonasal disease were evaluated to measure and compare the IT, medial mucosal thickness (MT), and space between the nasal septum and IT according to clinical characteristics such as septal deviation. A HIFU prototype was developed based on the above human anatomical studies. The experimental study was performed in five pigs; the nasal volume and histological changes at 1 and 4 weeks postoperatively were evaluated to compare the efficacy of HIFU turbinoplasty with that of radiofrequency turbinoplasty and a control group. Results The mean medial MT of the anterior, middle, and posterior portions of the IT were 4.66±1.14, 4.23±0.97, and 6.17±1.29 mm, respectively. The mean medial space was 2.65±0.79 mm. The diameter and focal depth of the prototype were 4 mm and 3 mm, respectively. HIFU showed no postoperative complications, including bleeding or scar formation. After HIFU treatment, the nasal volume increased by 196.62 mm3 (7.8%) and 193.74 mm3 (8.3%) at 1 week and 4 weeks, compared with the increase of 87.20 mm3 (3.1%) and 213.81 mm3 (9.0%), respectively,after radiofrequency therapy. A qualitative histological analysis after radiofrequency turbinoplasty showed epithelial layer disruption at 1 week and increased fibrosis, along with decreased glandular structure, at 4 weeks. The HIFU group had an intact epithelial layer at 1 week postoperatively. However, significant differences were observed at 4 weeks, including increased fibrosis and decreased glandular structure. Conclusion The efficacy and safety of HIFU turbinoplasty were demonstrated in an animal study. Our results warrant further human clinical trials.
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Affiliation(s)
- Joon Kon Kim
- Department of Otorhinolaryngology- Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Sung-Woo Cho
- Department of Otorhinolaryngology- Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hyojin Kim
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Korea
| | | | - Hyung Gu Kim
- Department of Otorhinolaryngology- Head and Neck Surgery, Hanyang National University Guri Hospital, Guri, Korea
| | - Tae-Bin Won
- Department of Otorhinolaryngology- Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jeong-Whun Kim
- Department of Otorhinolaryngology- Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jae Hyun Lim
- Department of Otorhinolaryngology-Head and Neck Surgery, National Police Hospital, Seoul, Korea
| | - Chae-Seo Rhee
- Department of Otorhinolaryngology- Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.,Department of Otorhinolaryngology- Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea
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Domic D, Bertl K, Ahmad S, Schropp L, Hellén-Halme K, Stavropoulos A. Accuracy of cone-beam computed tomography is limited at implant sites with a thin buccal bone: A laboratory study. J Periodontol 2020; 92:592-601. [PMID: 32846005 PMCID: PMC8247288 DOI: 10.1002/jper.20-0222] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND To evaluate whether buccal bone thickness (BBT), implant diameter, and abutment/crown material influence the accuracy of cone-beam computed tomography (CBCT) to determine the buccal bone level at titanium implants. METHODS Two implant beds (i.e., narrow and standard diameter) were prepared in each of 36 porcine bone blocks. The implant beds were positioned at a variable distance from the buccal bone surface; thus, resulting in three BBT groups (i.e., >0.5 to 1.0; >1.0 to 1.5; >1.5 to 2.0 mm). In half of the blocks, a buccal bone dehiscence of random extent ("depth") was created and implants were mounted with different abutment/crown material (i.e., titanium abutments with a metal-ceramic crown and zirconia abutments with an all-ceramic zirconia crown). The distance from the implant shoulder to the buccal bone crest was measured on cross-sectional CBCT images and compared with the direct measurements at the bone blocks. RESULTS While abutment/crown material and implant diameter had no effect on the detection accuracy of the buccal bone level at dental implants in CBCT scans, BBT had a significant effect. Specifically, when BBT was ≤1.0 mm, a dehiscence was often diagnosed although not present, that is, the sensitivity was high (95.8%), but the specificity (12.5%) and the detection accuracy (54.2%) were low. Further, the average measurement error of the distance from the implant shoulder to the buccal bone crest was 1.6 mm. CONCLUSIONS Based on the present laboratory study, BBT has a major impact on the correct diagnosis of the buccal bone level at dental titanium implants in CBCT images; in cases where the buccal bone is ≤1 mm thick, detection of the buccal bone level is largely inaccurate.
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Affiliation(s)
- Danijel Domic
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Kristina Bertl
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Salman Ahmad
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden
| | - Lars Schropp
- Section of Oral Radiology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Kristina Hellén-Halme
- Department of Oral and Maxillofacial Radiology, Faculty of Odontology, University of Malmö, Malmö, Sweden
| | - Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Division of Regenerative Dentistry and Periodontology, University Clinics of Dental Medicine (CUMD), University of Geneva, Geneva, Switzerland
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Jang JH, Moon JH, Kim SG, Kim SY. Pulp regeneration with hemostatic matrices as a scaffold in an immature tooth minipig model. Sci Rep 2020; 10:12536. [PMID: 32719323 PMCID: PMC7385085 DOI: 10.1038/s41598-020-69437-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/07/2020] [Indexed: 12/19/2022] Open
Abstract
Control of blood clotting in root canal systems is one of the most critical and difficult concerns for regenerative endodontics therapy (RET). The purpose of this study was to investigate the effects of using gelatin- and fibrin-based hemostatic hydrogels as a scaffold on pulp regeneration in a minipig model. Cell viability of human dental pulp stem cells cultured three-dimensionally in gelatin-based and fibrin-based scaffolds was evaluated by MTT and live/dead assay. RET was performed on 24 immature premolars with an autologous blood clot (PC), gelatin-based and fibrin-based hemostatic matrices (GM and FM), or without the insertion of a scaffold (NC). The follow-up period was 12 weeks. Radiographic and histologic assessments for pulp regeneration were performed. Gelatin-based scaffolds exhibited significantly higher cell viability than fibrin-based scaffolds after 15 days (P < 0.05). The PC and GM groups showed favorable root development without inflammation and newly mineralized tissue deposited in the root canal system, while FM group presented inflammatory changes with the continuation of root development. The NC group exhibited internal root resorption with periapical lesions. The application of GM in RET led to favorable clinical outcomes of root development without inflammatory changes compared to conventional RET. Our results suggest that GM may serve as a viable regenerative scaffold for pulp regeneration.
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Affiliation(s)
- Ji-Hyun Jang
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Joung-Ho Moon
- Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehakno, Jongno-gu, Seoul, 03080, Korea
| | - Sahng Gyoon Kim
- Division of Endodontics, College of Dental Medicine, Columbia University, New York, NY, USA.
| | - Sun-Young Kim
- Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehakno, Jongno-gu, Seoul, 03080, Korea.
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Mader BJ, Hammer RB. On the true nature of the sphenoidal “pits” in the common warthog, Phacochoerus africanus (Artiodactyla, Suidae), and a description of the cranial sinuses. J Mammal 2020. [DOI: 10.1093/jmammal/gyaa035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
The peculiar sphenoidal “pits” of the common warthog (Phacochoerus africanus) long have been recognized as a feature that distinguishes that species from the closely related desert warthog (P. aethiopicus). Authors seem to regard these structures as blind pockets that do not extend beyond the basicranium. However, these structures actually are openings that lead into a complex system of sinuses (the sphenoidal sinuses) located in the sphenoid and squamosal, and occasionally extending into the occipital and parietal bones. The openings appear to serve as a drain into the nasopharynx. The sphenoidal “pits” of P. africanus as currently defined by most authors are, therefore, not homologous with the sphenoidal pits of P. aethiopicus. We suggest that the term “sphenoidal apertures” be applied to these openings. The true homologue of the sphenoidal pits of P. aethiopicus is the bone that surrounds the sphenoidal apertures in P. africanus. This would include the thin bony sheet that forms the floor of the opening and that bears a shallow fossa. We recommend the term “sphenoidal shelf” be employed to describe this part of the true sphenoidal pit of P. africanus. In addition to the sphenoidal sinuses, the maxillary and frontal sinuses of P. africanus also are described. We report the possibility of mammalian cranial sinuses arising from nasopharyngeal diverticula rather than from diverticula originating from the nasal cavity proper. Previously, such nasopharyngeal pneumatization only has been known to occur in Reptilia. Possible sinus functions are discussed including shock absorption, lightening of the skull, improvement of olfaction, and enhancement of the immune system. In addition to P. africanus, sphenoidal apertures also occur in Babyrousa, and in an extinct perissodactyl, a brontothere (= titanothere).
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Affiliation(s)
- Bryn J Mader
- Department of Biological Sciences and Geology, Queensborough Community College, 222-05 56th Avenue, Bayside, NY, USA
| | - Rachel B Hammer
- Department of Biological Sciences and Geology, Queensborough Community College, 222-05 56th Avenue, Bayside, NY, USA
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Baek KW, Dard M, Zeilhofer HF, Cattin PC, Juergens P. Comparing the Bone Healing After Cold Ablation Robot-Guided Er:YAG Laser Osteotomy and Piezoelectric Osteotomy-A Pilot Study in a Minipig Mandible. Lasers Surg Med 2020; 53:291-299. [PMID: 32529785 DOI: 10.1002/lsm.23281] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/17/2020] [Accepted: 05/18/2020] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND OBJECTIVE To take major advantage of erbium-doped yttrium aluminium garnet (Er:YAG) lasers in osteotomy-like freedom of cutting geometries and high accuracy-the integration and miniaturization of the robot, laser, and navigation technology was tried and applied to minipigs. The investigators hypothesized laser osteotomy would render acceptable bone healing based on the intraoperative findings and postoperative cut surface analysis. STUDY DESIGN/MATERIALS AND METHODS We designed and implemented a comparative bone-cutting surgery in the minipig mandible with a cold ablation robot-guided Er:YAG laser osteotome (CARLO) and a piezoelectric (PZE) osteotome. The sample was composed of different patterns of defects in the mandibles of six grown-up female Goettingen minipigs. The predictor variable was Er:YAG osteotomy and PZE osteotomy. The outcome variable was the cut surface characteristics and bone healing at 4 and 8 weeks postoperatively. Descriptive and qualitative comparison was executed. RESULTS The sample was composed of four kinds of bone defects on both sides of the mandibles of six minipigs. We observed more bleeding during the operation, open-cut surfaces, and a faster healing pattern with the laser osteotomy. There was a possible association between the intraoperative findings, postoperative cut surface analysis, and the bone healing pattern. CONCLUSIONS The results of this study suggest that characteristic open-cut surfaces could explain favorable bone healing after laser osteotomy. Future studies will focus on the quantification of the early healing characteristics after laser osteotomy, its diverse application, and the safety feature. Lasers Surg. Med. © 2020 Wiley Periodicals LLC.
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Affiliation(s)
- Kyung-Won Baek
- Department of Biomedical Engineering, Hightech Research Center of Cranio-Maxillofacial Surgery (HFZ), University of Basel, Gewerbestrasse 14-16, Allschwil, 4123, Switzerland
| | - Michel Dard
- Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University, New York, New York.,Institut Straumann AG, Peter Merian-Weg 12, Basel, 4002, Switzerland
| | - Hans-Florian Zeilhofer
- Department of Biomedical Engineering, Hightech Research Center of Cranio-Maxillofacial Surgery (HFZ), University of Basel, Gewerbestrasse 14-16, Allschwil, 4123, Switzerland
| | - Philippe C Cattin
- Department of Biomedical Engineering, Center for Medical Image Analysis & Navigation, University of Basel, Gewerbestrasse 14, Allschwil, 4123, Switzerland
| | - Philipp Juergens
- Department of Cranio-Maxillofacial Surgery, University Hospital of Basel, Spitalstrasse 21, Basel, 4031, Switzerland.,MKG-Chirurgie Arabellapark Praxis für Mund-, Kiefer- und Gesichtschirurgie, Arabellastr. 17, München, 81925, Germany
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Oldhafer F, Wittauer EM, Beetz O, Vondran FWR. Long-term Functional Maintenance of Exteriorized Portal Venous Catheters in a Porcine Animal Model. J Surg Res 2020; 251:187-194. [PMID: 32163793 DOI: 10.1016/j.jss.2020.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 01/10/2020] [Accepted: 02/01/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Portal venous access for blood sampling, infusion therapy, and measurement of portal venous pressure is of special interest for experimental studies in surgery, pharmacology, and hepatology. Chronic animal models with continuous portal venous access are rare and especially thrombosis or clotting of permanent catheters is a frequent complication. Aim of this study was to establish a preclinical pig model with a permanent portal venous catheter (PVC). MATERIALS AND METHODS PVC implantation was performed in 21 LEWE mini pigs. The catheter was inserted in the distal part of the superior mesenteric vein and fixated with a tobacco-pouch suture. Animals were followed up for 4 wk, directly after implantation of the PVC. Blood gas analyses and portal venous pressures were recorded. Three different groups with continuous infusion via the catheters were defined: NaCl solution (2 mL/h) (group 1), NaCl solution (2 mL/h) + enoxaparin sodium injection (anti-Xa levels of 0.3-0.8 U/mL) (group 2) and heparinized NaCl (2 I.E./mL, 2 mL/h) (group 3). RESULTS All 21 PVC implantations were performed without any complications. Application of continuous perfusion with heparinized NaCl (group 3) enabled portal venous access for the entire experiment in 8 of 10 cases (mean of 23.7 d) without any signs of dysfunction. However, for use of NaCl alone or in combination with enoxaparin sodium, catheters were only functional for 6.8 d and 6.9 d, respectively. CONCLUSIONS Permanent portal venous access through PVC in mini pigs is achievable by continuous infusion of low-dose heparinized NaCl solution.
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Affiliation(s)
- Felix Oldhafer
- Department of General, Visceral and Transplant Surgery, ReMediES, Hannover Medical School, Hannover, Germany.
| | - Eva-Maria Wittauer
- Department of General, Visceral and Transplant Surgery, ReMediES, Hannover Medical School, Hannover, Germany
| | - Oliver Beetz
- Department of General, Visceral and Transplant Surgery, ReMediES, Hannover Medical School, Hannover, Germany
| | - Florian W R Vondran
- Department of General, Visceral and Transplant Surgery, ReMediES, Hannover Medical School, Hannover, Germany
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42
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Chen Y, Quddusi A, Harrison KA, Ryan PE, Cook DJ. Selection of preclinical models to evaluate intranasal brain cooling for acute ischemic stroke. Brain Circ 2019; 5:160-168. [PMID: 31950091 PMCID: PMC6950506 DOI: 10.4103/bc.bc_20_19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/28/2019] [Indexed: 01/12/2023] Open
Abstract
Stroke accounts for a large proportion of global mortality and morbidity. Selective hypothermia, via intranasal cooling devices, is a promising intervention in acute ischemic stroke. However, prior to large clinical trials, preclinical studies in large animal models of ischemic stroke are needed to assess the efficacy, safety, and feasibility of intranasal cooling for selective hypothermia as a neuroprotective strategy. Here, we review the available scientific literature for evidence supporting selective hypothermia and make recommendations of a preclinical, large, animal-based, ischemic stroke model that has the greatest potential for evaluating intranasal cooling for selective hypothermia and neuroprotection. We conclude that among large animal models of focal ischemic stroke including pigs, sheep, dogs, and nonhuman primates (NHPs), cynomolgus macaques have nasal anatomy, nasal vasculature, neuroanatomy, and cerebrovasculature that are most similar to those of humans. Moreover, middle cerebral artery stroke in cynomolgus macaques produces functional and behavioral deficits that are quantifiable to a greater degree of precision and detail than those that can be revealed through available assessments for other large animals. These NHPs are also amenable to extensive neuroimaging studies as a means of monitoring stroke evolution and evaluating infarct size. Hence, we suggest that cynomolgus macaques are best suited to assess the safety and efficacy of intranasal selective hypothermia through an evaluation of hyperacute diffusion-weighted imaging and subsequent investigation of chronic functional recovery, prior to randomized clinical trials in humans.
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Affiliation(s)
- Yining Chen
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
| | - Ayesha Quddusi
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
| | | | - Paige E Ryan
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
| | - Douglas J Cook
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,Department of Surgery, Division of Neurosurgery, Kingston General Hospital, Kingston, ON, Canada
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43
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Mazingi DS, Mutambanengwe P, Zimunhu T, Gwatirisa T, Mbuwayesango BA, Munanzvi K, Muparadzi C, Moyo M, Mwanza Y. Intestinal Evisceration in Children From the Bite of the Domestic Pig, Sus scrofa domesticus: A Report of Two Cases. Wilderness Environ Med 2019; 30:454-460. [DOI: 10.1016/j.wem.2019.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 06/26/2019] [Accepted: 08/01/2019] [Indexed: 10/25/2022]
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44
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Lindsay CD, Timperley CM. TRPA1 and issues relating to animal model selection for extrapolating toxicity data to humans. Hum Exp Toxicol 2019; 39:14-36. [PMID: 31578097 DOI: 10.1177/0960327119877460] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The transient receptor potential ankyrin 1 (TRPA1) ion channel is a sensor for irritant chemicals, has ancient lineage, and is distributed across animal species including humans, where it features in many organs. Its activation by a diverse panel of electrophilic molecules (TRPA1 agonists) through electrostatic binding and/or covalent attachment to the protein causes the sensation of pain. This article reviews the species differences between TRPA1 channels and their responses, to assess the suitability of different animals to model the effects of TRPA1-activating electrophiles in humans, referring to common TRPA1 activators (exogenous and endogenous) and possible mechanisms of action relating to their toxicology. It concludes that close matching of in vitro and in vivo models will help optimise the identification of relevant biochemical and physiological responses to benchmark the efficacy of potential therapeutic drugs, including TRPA1 antagonists, to counter the toxic effects of those electrophiles capable of harming humans. The analysis of the species issue provided should aid the development of medical treatments to counter poisoning by such chemicals.
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Affiliation(s)
- C D Lindsay
- Chemical, Biological and Radiological (CBR) Division, Defence Science and Technology Laboratory (Dstl), Salisbury, UK
| | - C M Timperley
- Chemical, Biological and Radiological (CBR) Division, Defence Science and Technology Laboratory (Dstl), Salisbury, UK
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45
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Ali MJ, Rehorek SJ, Paulsen F. A major review on disorders of the animal lacrimal drainage systems: Evolutionary perspectives and comparisons with humans. Ann Anat 2019; 224:102-112. [DOI: 10.1016/j.aanat.2019.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 01/12/2023]
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46
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Wu Y, Cisewski SE, Coombs MC, Brown MH, Wei F, She X, Kern MJ, Gonzalez YM, Gallo LM, Colombo V, Iwasaki LR, Nickel JC, Yao H. Effect of Sustained Joint Loading on TMJ Disc Nutrient Environment. J Dent Res 2019; 98:888-895. [PMID: 31126205 DOI: 10.1177/0022034519851044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The temporomandibular joint (TMJ) disc nutrient environment profoundly affects cell energy metabolism, proliferation, and biosynthesis. Due to technical challenges of in vivo measurements, the human TMJ disc extracellular nutrient environment under load, which depends on metabolic rates, solute diffusion, and disc morphometry, remains unknown. Therefore, the study objective was to predict the TMJ disc nutrient environment under loading conditions using combined experimental and computational modeling approaches. Specifically, glucose consumption and lactate production rates of porcine TMJ discs were measured under varying tissue culture conditions (n = 40 discs), and mechanical strain-dependent glucose and lactate diffusivities were measured using a custom diffusion chamber (n = 6 discs). TMJ anatomy and loading area were obtained from magnetic resonance imaging of healthy human volunteers (n = 11, male, 30 ± 9 y). Using experimentally determined nutrient metabolic rates, solute diffusivities, TMJ anatomy, and loading areas, subject-specific finite element (FE) models were developed to predict the 3-dimensional nutrient profiles in unloaded and loaded TMJ discs (unloaded, 0% strain, 20% strain). From the FE models, glucose, lactate, and oxygen concentration ranges for unloaded healthy human TMJ discs were 0.6 to 4.0 mM, 0.9 to 5.0 mM, and 0% to 6%, respectively, with steep gradients in the anterior and posterior bands. Sustained mechanical loading significantly reduced nutrient levels (P < 0.001), with a critical zone in which cells may die representing approximately 13.5% of the total disc volume. In conclusion, this study experimentally determined TMJ disc metabolic rates, solute diffusivities, and disc morphometry, and through subject-specific FE modeling, revealed critical interactions between mechanical loading and nutrient supply and metabolism for the in vivo human TMJ disc. The results suggest that TMJ disc homeostasis may be vulnerable to pathological loading (e.g., clenching, bruxism), which impedes nutrient supply. Given difficulties associated with direct in vivo measurements, this study provides a new approach to systematically investigate homeostatic and degenerative mechanisms associated with the TMJ disc.
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Affiliation(s)
- Y Wu
- 1 Department of Bioengineering, Clemson University, Clemson, SC, USA.,2 Department of Orthopaedics and Physical Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA
| | - S E Cisewski
- 1 Department of Bioengineering, Clemson University, Clemson, SC, USA.,3 Department of Oral Health Sciences, College of Dental Medicine, MUSC, Charleston, SC, USA
| | - M C Coombs
- 1 Department of Bioengineering, Clemson University, Clemson, SC, USA.,3 Department of Oral Health Sciences, College of Dental Medicine, MUSC, Charleston, SC, USA
| | - M H Brown
- 3 Department of Oral Health Sciences, College of Dental Medicine, MUSC, Charleston, SC, USA
| | - F Wei
- 1 Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - X She
- 1 Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - M J Kern
- 3 Department of Oral Health Sciences, College of Dental Medicine, MUSC, Charleston, SC, USA
| | - Y M Gonzalez
- 4 Department of Oral Diagnostic Sciences, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - L M Gallo
- 5 Clinic of Masticatory Disorders, University of Zurich, School of Dental Medicine, Zurich, Switzerland
| | - V Colombo
- 5 Clinic of Masticatory Disorders, University of Zurich, School of Dental Medicine, Zurich, Switzerland
| | - L R Iwasaki
- 6 Department of Orthodontics, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - J C Nickel
- 6 Department of Orthodontics, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - H Yao
- 1 Department of Bioengineering, Clemson University, Clemson, SC, USA.,2 Department of Orthopaedics and Physical Medicine, Medical University of South Carolina (MUSC), Charleston, SC, USA.,3 Department of Oral Health Sciences, College of Dental Medicine, MUSC, Charleston, SC, USA
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47
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Corte GM, Hünigen H, Richardson KC, Niehues SM, Plendl J. Cephalometric studies of the mandible, its masticatory muscles and vasculature of growing Göttingen Minipigs-A comparative anatomical study to refine experimental mandibular surgery. PLoS One 2019; 14:e0215875. [PMID: 31022244 PMCID: PMC6483209 DOI: 10.1371/journal.pone.0215875] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/09/2019] [Indexed: 12/30/2022] Open
Abstract
Over many decades, the Göttingen Minipig has been used as a large animal model in experimental surgical research of the mandible. Recently several authors have raised concerns over the use of the Göttingen Minipig in this research area, observing problems with post-operative wound healing and loosening implants. To reduce these complications during and after surgery and to improve animal welfare in mandibular surgery research, the present study elucidated how comparable the mandible of minipigs is to that of humans and whether these complications could be caused by specific anatomical characteristics of the minipigs' mandible, its masticatory muscles and associated vasculature. Twenty-two mandibular cephalometric parameters were measured on CT scans of Göttingen Minipigs aged between 12 and 21 months. Ultimately, we compared this data with human data reported in the scientific literature. In addition, image segmentation was used to determine the masticatory muscle morphology and the configuration of the mandibular blood vessels. Compared to data of humans, significant differences in the mandibular anatomy of minipigs were found. Of the 22 parameters measured only four were found to be highly comparable, whilst the others were not. The 3D examinations of the minipigs vasculature showed a very prominent deep facial vein directly medial to the mandibular ramus and potentially interfering with the sectional plane of mandibular distraction osteogenesis. Damage to this vessel could result in inaccessible bleeding. The findings of this study suggest that Göttingen Minipigs are not ideal animal models for experimental mandibular surgery research. Nevertheless if these minipigs are used the authors recommend that radiographic techniques, such as computed tomography, be used in the specific planning procedures for the mandibular surgical experiments. In addition, it is advisable to choose suitable age groups and customize implants based on the mandibular dimensions reported in this study.
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Affiliation(s)
- Giuliano Mario Corte
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Hana Hünigen
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Kenneth C. Richardson
- College of Veterinary Medicine, School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia
| | - Stefan M. Niehues
- Department of Radiology, Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Johanna Plendl
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
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48
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Effect of human adipose-derived regenerative cells on temporomandibular joint healing in immunodeficient rabbits. ACTA VET BRNO 2019. [DOI: 10.2754/avb201988010049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Increasing research attention has focused on the use of stem cells (SCs) in regenerative and reparative medicine. Adipose-derived regenerative cells (ADRCs) are a relatively cheap and ethical source of SCs. Temporomandibular disorders (TMDs) have been reported with rising incidence over recent decades. The main aims of this study were to evaluate the effects of ADRCs application on the healing of both soft and hard temporomandibular joint (TMJ) tissues, and to assess the possible utilization of ADRCs in TMD treatment. We investigated the effects of human ADRCs on the healing of TMJ defects in immunodeficient rabbits. With no prior cultivation, ADRCs were applied to a surgically created defect in the cartilage of a rabbit TMJ. The healing process and inflammatory response were examined. Our results indicated that ADRCs supported repair processes in soft tissues. However, ADRC treatment induced a significant immune response in both soft and hard tissues, with hard tissues showing a higher level of bone remodelling. Non-differentiated ADRCs can be a promising tool for regenerative medicine of TMJ; however, deeper understanding of their effect on the cellular level is needed.
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49
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Nakashima M, Iohara K, Bottino MC, Fouad AF, Nör JE, Huang GTJ. Animal Models for Stem Cell-Based Pulp Regeneration: Foundation for Human Clinical Applications. TISSUE ENGINEERING. PART B, REVIEWS 2019; 25:100-113. [PMID: 30284967 PMCID: PMC6486672 DOI: 10.1089/ten.teb.2018.0194] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/18/2018] [Indexed: 12/21/2022]
Abstract
IMPACT STATEMENT Animal models are essential for tissue regeneration studies. This review summarizes and discusses the small and large animal models, including mouse, ferret, dog, and miniswine that have been utilized to experiment and to demonstrate stem cell-mediated dental pulp tissue regeneration. We describe the models based on the location where the tissue regeneration is tested-either ectopic, semiorthotopic, or orthotopic. Developing and utilizing optimal animal models for both mechanistic and translational studies of pulp regeneration are of critical importance to advance this field.
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Affiliation(s)
- Misako Nakashima
- Department of Stem Cell Biology and Regenerative Medicine, National Center for Geriatrics and Gerontology, Aichi, Japan
| | - Koichiro Iohara
- Department of Stem Cell Biology and Regenerative Medicine, National Center for Geriatrics and Gerontology, Aichi, Japan
| | - Marco C. Bottino
- Department of Cariology, Restorative Sciences, Endodontics, University of Michigan, School of Dentistry, Ann Arbor, Michigan
| | - Ashraf F. Fouad
- Department of Endodontics, School of Dentistry, University of North Carolina, Chapel Hill, North Carolina
| | - Jacques E. Nör
- Department of Cariology, Restorative Sciences, Endodontics, University of Michigan, School of Dentistry, Ann Arbor, Michigan
| | - George T.-J. Huang
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tennessee
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50
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Middendorf J, Albahrani S, Bonassar LJ. Stribeck Curve Analysis of Temporomandibular Joint Condylar Cartilage and Disc. J Biomech Eng 2019; 141:1066041. [PMID: 31654071 DOI: 10.1115/1.4045283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Indexed: 12/29/2022]
Abstract
Temporomandibular joint (TMJ) diseases such as osteoarthritis and disc displacement have no permanent treatment options, but lubrication therapies, used in other joints, could be an effective alternative. However, the healthy TMJ contains fibrocartilage, not hyaline cartilage as is found in other joints. As such, the effect of lubrication therapies in the TMJ is unknown. Additionally, only a few studies have characterized the friction coefficient of the healthy TMJ. Like other cartilaginous tissues, the TMJ condyles and discs are subject to changes in friction coefficient due to fluid pressurization. In addition, the friction coefficient of the TMJ is affected by the sliding direction and anatomic location. However, these previous findings have not been able to identify how all 3 of these parameters (anatomic location, sliding direction, and fluid pressurization) influence changes in friction coefficient. This study used Stribeck curves to identify differences in the friction coefficients of TMJ condyles and discs based on anatomic location, sliding direction, and amount of fluid pressurization (friction mode). Friction coefficients were measured using a cartilage on glass tribometer. Both TMJ condyle and disc friction coefficients were well described by Stribeck curves. These curves changed based on anatomic location, but very few differences in friction coefficients were observed based on sliding direction. TMJ condyles had similar boundary mode and elastoviscous mode friction coefficients to the TMJ disc, and both were lower than hyaline cartilage in other joints. The observed differences here indicate that the surface characteristics of each anatomic region cause differences in friction coefficients.
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Affiliation(s)
- Jill Middendorf
- Sibley School of Mechanical and Aerospace Engineering Cornell University, Ithaca, NY
| | - Shaden Albahrani
- Department of Chemical Engineering, Virginia Polytechnic Institute and University, Blacksburg, VA
| | - Lawrence J Bonassar
- Sibley School of Mechanical and Aerospace Engineering Cornell University, Ithaca, NY; Meinig School of Biomedical Engineering Cornell University, Ithaca, NY
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